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-crafted/bAnd1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:41:12,930 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:41:12,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:41:12,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:41:12,948 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:41:12,949 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:41:12,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:41:12,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:41:12,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:41:12,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:41:12,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:41:12,957 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:41:12,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:41:12,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:41:12,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:41:12,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:41:12,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:41:12,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:41:12,970 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:41:12,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:41:12,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:41:12,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:41:12,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:41:12,981 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:41:12,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:41:12,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:41:12,992 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:41:12,993 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:41:12,993 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:41:12,997 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:41:12,997 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:41:12,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:41:12,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:41:12,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:41:13,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:41:13,004 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:41:13,005 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 [2019-10-13 17:41:13,027 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:41:13,027 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:41:13,029 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:41:13,029 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:41:13,029 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:41:13,029 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:41:13,030 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:41:13,030 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:41:13,030 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:41:13,030 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:41:13,030 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:41:13,031 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:41:13,031 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:41:13,031 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:41:13,031 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:41:13,032 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:41:13,032 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:41:13,032 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:41:13,032 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:41:13,032 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:41:13,033 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:41:13,033 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:41:13,033 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:41:13,033 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:41:13,034 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:41:13,034 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:41:13,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:41:13,034 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:41:13,034 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:41:13,347 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:41:13,361 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:41:13,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:41:13,366 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:41:13,366 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:41:13,367 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bAnd1.i [2019-10-13 17:41:13,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d5eec7a/f4516e33f62148b495b8f54d1db01aab/FLAG2767fed3a [2019-10-13 17:41:13,896 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:41:13,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bAnd1.i [2019-10-13 17:41:13,904 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d5eec7a/f4516e33f62148b495b8f54d1db01aab/FLAG2767fed3a [2019-10-13 17:41:14,308 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75d5eec7a/f4516e33f62148b495b8f54d1db01aab [2019-10-13 17:41:14,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:41:14,321 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:41:14,324 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,324 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:41:14,328 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:41:14,329 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b66671 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14, skipping insertion in model container [2019-10-13 17:41:14,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,341 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:41:14,359 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:41:14,557 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,568 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:41:14,609 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:41:14,720 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:41:14,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14 WrapperNode [2019-10-13 17:41:14,720 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:41:14,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,721 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:41:14,721 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:41:14,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,734 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,771 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (1/1) ... [2019-10-13 17:41:14,776 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:41:14,777 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:41:14,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:41:14,777 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:41:14,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (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 [2019-10-13 17:41:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:41:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:41:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure bAnd [2019-10-13 17:41:14,832 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:41:14,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:41:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:41:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure bAnd [2019-10-13 17:41:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:41:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:41:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:41:14,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:41:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:41:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:41:14,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:41:15,167 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:41:15,168 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:41:15,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:15 BoogieIcfgContainer [2019-10-13 17:41:15,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:41:15,170 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:41:15,170 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:41:15,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:41:15,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:41:14" (1/3) ... [2019-10-13 17:41:15,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51535d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:15, skipping insertion in model container [2019-10-13 17:41:15,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:41:14" (2/3) ... [2019-10-13 17:41:15,175 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51535d91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:41:15, skipping insertion in model container [2019-10-13 17:41:15,176 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:41:15" (3/3) ... [2019-10-13 17:41:15,177 INFO L109 eAbstractionObserver]: Analyzing ICFG bAnd1.i [2019-10-13 17:41:15,186 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:41:15,193 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:41:15,204 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:41:15,230 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:41:15,230 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:41:15,230 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:41:15,231 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:41:15,231 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:41:15,231 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:41:15,231 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:41:15,231 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:41:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-13 17:41:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:15,255 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,256 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,258 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-10-13 17:41:15,269 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,269 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265799331] [2019-10-13 17:41:15,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,270 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,270 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,497 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265799331] [2019-10-13 17:41:15,500 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:41:15,501 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:41:15,503 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395345609] [2019-10-13 17:41:15,510 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,510 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,524 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-13 17:41:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,622 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-10-13 17:41:15,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,624 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,634 INFO L225 Difference]: With dead ends: 54 [2019-10-13 17:41:15,634 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 17:41:15,638 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:41:15,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 17:41:15,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 17:41:15,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 17:41:15,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 17:41:15,688 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-10-13 17:41:15,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,688 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 17:41:15,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 17:41:15,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 17:41:15,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,692 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:15,692 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-10-13 17:41:15,693 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:15,693 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828422602] [2019-10-13 17:41:15,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,694 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:15,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:15,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-13 17:41:15,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828422602] [2019-10-13 17:41:15,796 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580430133] [2019-10-13 17:41:15,796 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 [2019-10-13 17:41:15,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:15,866 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:15,873 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:15,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-13 17:41:15,906 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:15,906 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-10-13 17:41:15,906 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916079917] [2019-10-13 17:41:15,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:15,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:15,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:15,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:41:15,910 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-10-13 17:41:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:15,926 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-10-13 17:41:15,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:15,927 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-10-13 17:41:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:15,928 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:15,928 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:41:15,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:41:15,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:41:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-10-13 17:41:15,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 17:41:15,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-10-13 17:41:15,938 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-10-13 17:41:15,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:15,939 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-10-13 17:41:15,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:15,939 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-10-13 17:41:15,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 17:41:15,941 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:15,941 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:16,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,147 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-10-13 17:41:16,149 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977508526] [2019-10-13 17:41:16,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,150 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-13 17:41:16,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977508526] [2019-10-13 17:41:16,331 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574793678] [2019-10-13 17:41:16,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-13 17:41:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,408 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,414 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:41:16,428 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,429 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-10-13 17:41:16,429 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563393180] [2019-10-13 17:41:16,430 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,430 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:16,432 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-10-13 17:41:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,454 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-10-13 17:41:16,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,457 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-10-13 17:41:16,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,458 INFO L225 Difference]: With dead ends: 46 [2019-10-13 17:41:16,459 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 17:41:16,461 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:41:16,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 17:41:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-10-13 17:41:16,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 17:41:16,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-13 17:41:16,475 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-10-13 17:41:16,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,476 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-13 17:41:16,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-13 17:41:16,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:41:16,482 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,483 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:16,687 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,688 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:16,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:16,688 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-10-13 17:41:16,689 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:16,689 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557332729] [2019-10-13 17:41:16,689 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,690 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:16,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:16,841 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557332729] [2019-10-13 17:41:16,842 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786683906] [2019-10-13 17:41:16,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:16,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-10-13 17:41:16,913 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-13 17:41:16,940 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:41:16,940 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-13 17:41:16,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168157118] [2019-10-13 17:41:16,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:41:16,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:16,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:41:16,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,942 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-13 17:41:16,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:16,961 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-10-13 17:41:16,962 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:41:16,962 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-10-13 17:41:16,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:16,964 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:41:16,964 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 17:41:16,965 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:16,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 17:41:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-13 17:41:16,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 17:41:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-13 17:41:16,977 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-10-13 17:41:16,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:16,980 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-13 17:41:16,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:41:16,981 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-13 17:41:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 17:41:16,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:16,984 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:17,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,196 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-10-13 17:41:17,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,198 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592654659] [2019-10-13 17:41:17,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,199 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,199 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,287 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:41:17,287 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592654659] [2019-10-13 17:41:17,288 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087390235] [2019-10-13 17:41:17,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-10-13 17:41:17,372 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,372 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-10-13 17:41:17,372 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181972218] [2019-10-13 17:41:17,373 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 17:41:17,373 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 17:41:17,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-10-13 17:41:17,374 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-13 17:41:17,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:17,542 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-10-13 17:41:17,543 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 17:41:17,543 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-10-13 17:41:17,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:17,544 INFO L225 Difference]: With dead ends: 55 [2019-10-13 17:41:17,544 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 17:41:17,546 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:41:17,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 17:41:17,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-10-13 17:41:17,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 17:41:17,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-10-13 17:41:17,560 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-10-13 17:41:17,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:17,561 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-10-13 17:41:17,561 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 17:41:17,561 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-10-13 17:41:17,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 17:41:17,565 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:17,565 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:17,766 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,766 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-10-13 17:41:17,768 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:17,768 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285604932] [2019-10-13 17:41:17,768 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,769 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:17,769 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285604932] [2019-10-13 17:41:17,880 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073350168] [2019-10-13 17:41:17,880 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:17,938 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:17,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:17,941 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:17,945 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:17,968 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:17,969 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:41:17,969 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79333537] [2019-10-13 17:41:17,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:41:17,970 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:41:17,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:17,971 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-10-13 17:41:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,059 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-10-13 17:41:18,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:41:18,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-10-13 17:41:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,061 INFO L225 Difference]: With dead ends: 58 [2019-10-13 17:41:18,061 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 17:41:18,062 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:41:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 17:41:18,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-10-13 17:41:18,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 17:41:18,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-10-13 17:41:18,069 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-10-13 17:41:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:18,069 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-10-13 17:41:18,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:41:18,069 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-10-13 17:41:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-13 17:41:18,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:18,071 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:18,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,272 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:18,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-10-13 17:41:18,273 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:18,274 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016040617] [2019-10-13 17:41:18,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,274 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,398 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:41:18,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016040617] [2019-10-13 17:41:18,399 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112023022] [2019-10-13 17:41:18,399 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,466 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:41:18,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-10-13 17:41:18,495 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:18,495 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-10-13 17:41:18,495 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597930161] [2019-10-13 17:41:18,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:18,496 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:18,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,497 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-10-13 17:41:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:18,613 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-10-13 17:41:18,613 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:41:18,613 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-10-13 17:41:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:18,614 INFO L225 Difference]: With dead ends: 63 [2019-10-13 17:41:18,614 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 17:41:18,615 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:18,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 17:41:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-10-13 17:41:18,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 17:41:18,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-10-13 17:41:18,622 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-10-13 17:41:18,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:18,622 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-10-13 17:41:18,622 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:18,622 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-10-13 17:41:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-13 17:41:18,623 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:18,623 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:18,826 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:18,827 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:18,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:18,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-10-13 17:41:18,828 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:18,828 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643151480] [2019-10-13 17:41:18,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:18,829 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:18,919 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:18,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643151480] [2019-10-13 17:41:18,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799781362] [2019-10-13 17:41:18,920 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 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 [2019-10-13 17:41:18,978 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:18,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:18,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:18,994 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:19,025 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:19,026 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:19,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:41:19,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689331076] [2019-10-13 17:41:19,027 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:41:19,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:41:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:19,031 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-10-13 17:41:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:19,126 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-10-13 17:41:19,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:41:19,127 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-10-13 17:41:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:19,128 INFO L225 Difference]: With dead ends: 66 [2019-10-13 17:41:19,128 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 17:41:19,129 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:41:19,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 17:41:19,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-13 17:41:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 17:41:19,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-10-13 17:41:19,135 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-10-13 17:41:19,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:19,135 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-10-13 17:41:19,135 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:41:19,135 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-10-13 17:41:19,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:41:19,136 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:19,136 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:19,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,340 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-10-13 17:41:19,341 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918187957] [2019-10-13 17:41:19,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,342 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:19,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-13 17:41:19,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918187957] [2019-10-13 17:41:19,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050758960] [2019-10-13 17:41:19,454 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 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 [2019-10-13 17:41:19,519 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-10-13 17:41:19,519 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:19,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:19,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:19,567 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-10-13 17:41:19,568 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:19,568 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-10-13 17:41:19,568 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091097128] [2019-10-13 17:41:19,569 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:19,569 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:19,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:19,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:19,570 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-10-13 17:41:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:19,766 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-10-13 17:41:19,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:19,767 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-13 17:41:19,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:19,768 INFO L225 Difference]: With dead ends: 71 [2019-10-13 17:41:19,768 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 17:41:19,769 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:41:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 17:41:19,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-10-13 17:41:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 17:41:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-10-13 17:41:19,782 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-10-13 17:41:19,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:19,783 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-10-13 17:41:19,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:19,783 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-10-13 17:41:19,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-13 17:41:19,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:19,785 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:19,995 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:19,996 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:19,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:19,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-10-13 17:41:19,997 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:19,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001376296] [2019-10-13 17:41:19,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,998 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:19,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-10-13 17:41:20,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001376296] [2019-10-13 17:41:20,095 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707919880] [2019-10-13 17:41:20,096 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 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 [2019-10-13 17:41:20,174 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 17:41:20,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:20,177 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:20,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:20,299 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-10-13 17:41:20,300 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:20,300 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-10-13 17:41:20,300 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982411096] [2019-10-13 17:41:20,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:41:20,301 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:20,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:41:20,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:41:20,303 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-10-13 17:41:20,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:20,493 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-10-13 17:41:20,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:41:20,493 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-10-13 17:41:20,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:20,494 INFO L225 Difference]: With dead ends: 77 [2019-10-13 17:41:20,494 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 17:41:20,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:20,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 17:41:20,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-10-13 17:41:20,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 17:41:20,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-10-13 17:41:20,501 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-10-13 17:41:20,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:20,502 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-10-13 17:41:20,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:41:20,502 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-10-13 17:41:20,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-13 17:41:20,503 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:20,503 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:20,718 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:20,719 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:20,719 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-10-13 17:41:20,720 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:20,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586471601] [2019-10-13 17:41:20,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,721 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:20,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:20,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586471601] [2019-10-13 17:41:20,923 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016879437] [2019-10-13 17:41:20,923 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 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 [2019-10-13 17:41:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:20,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:20,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:21,032 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,033 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:21,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:41:21,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701453454] [2019-10-13 17:41:21,034 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:41:21,034 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:41:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:21,035 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-10-13 17:41:21,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:21,165 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-10-13 17:41:21,165 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:41:21,166 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-10-13 17:41:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:21,167 INFO L225 Difference]: With dead ends: 80 [2019-10-13 17:41:21,167 INFO L226 Difference]: Without dead ends: 52 [2019-10-13 17:41:21,170 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:41:21,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-13 17:41:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-13 17:41:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 17:41:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-10-13 17:41:21,184 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-10-13 17:41:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:21,184 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-10-13 17:41:21,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:41:21,185 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-10-13 17:41:21,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-13 17:41:21,191 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:21,191 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:21,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,398 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:21,399 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-10-13 17:41:21,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:21,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613130070] [2019-10-13 17:41:21,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:21,518 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613130070] [2019-10-13 17:41:21,519 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43142733] [2019-10-13 17:41:21,519 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 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 [2019-10-13 17:41:21,590 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:21,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:21,592 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:21,594 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:21,618 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:21,618 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:21,618 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:41:21,619 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335632190] [2019-10-13 17:41:21,619 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:41:21,620 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:21,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:41:21,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:41:21,622 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-10-13 17:41:21,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:21,723 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-10-13 17:41:21,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:41:21,724 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-10-13 17:41:21,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:21,725 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:41:21,725 INFO L226 Difference]: Without dead ends: 54 [2019-10-13 17:41:21,726 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:41:21,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-10-13 17:41:21,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-10-13 17:41:21,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-13 17:41:21,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-10-13 17:41:21,736 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-10-13 17:41:21,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:21,736 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-10-13 17:41:21,736 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:41:21,736 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-10-13 17:41:21,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:41:21,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:21,738 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:21,938 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:21,939 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:21,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:21,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-10-13 17:41:21,940 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:21,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023685053] [2019-10-13 17:41:21,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:21,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:21,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,073 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-10-13 17:41:22,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023685053] [2019-10-13 17:41:22,074 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150137864] [2019-10-13 17:41:22,074 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 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 [2019-10-13 17:41:22,137 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 17:41:22,137 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:22,138 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:41:22,140 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-10-13 17:41:22,195 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:22,196 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-10-13 17:41:22,196 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543651067] [2019-10-13 17:41:22,198 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:41:22,198 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:22,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:41:22,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:22,199 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-10-13 17:41:22,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:22,390 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-10-13 17:41:22,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 17:41:22,391 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-13 17:41:22,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:22,392 INFO L225 Difference]: With dead ends: 87 [2019-10-13 17:41:22,392 INFO L226 Difference]: Without dead ends: 59 [2019-10-13 17:41:22,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:41:22,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-13 17:41:22,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-10-13 17:41:22,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-10-13 17:41:22,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-10-13 17:41:22,403 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-10-13 17:41:22,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:22,404 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-10-13 17:41:22,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:41:22,404 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-10-13 17:41:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-10-13 17:41:22,405 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:22,405 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:22,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:22,609 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:22,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:22,610 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-10-13 17:41:22,610 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:22,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007812509] [2019-10-13 17:41:22,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,611 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:22,611 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:22,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-10-13 17:41:22,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007812509] [2019-10-13 17:41:22,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088613641] [2019-10-13 17:41:22,801 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 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 [2019-10-13 17:41:22,889 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:22,890 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:22,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:22,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:22,977 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-10-13 17:41:22,978 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:22,978 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-10-13 17:41:22,978 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547817886] [2019-10-13 17:41:22,979 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:22,979 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:22,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:22,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:22,980 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-10-13 17:41:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:23,220 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-10-13 17:41:23,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:41:23,221 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-10-13 17:41:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:23,222 INFO L225 Difference]: With dead ends: 93 [2019-10-13 17:41:23,222 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 17:41:23,222 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:23,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 17:41:23,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-10-13 17:41:23,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:41:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-10-13 17:41:23,229 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-10-13 17:41:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:23,229 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-10-13 17:41:23,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:23,229 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-10-13 17:41:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 17:41:23,230 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:23,230 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:23,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:23,434 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:23,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:23,435 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-10-13 17:41:23,435 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:23,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211577419] [2019-10-13 17:41:23,435 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:23,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-10-13 17:41:23,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211577419] [2019-10-13 17:41:23,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596194836] [2019-10-13 17:41:23,585 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 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 [2019-10-13 17:41:23,859 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-10-13 17:41:23,859 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:23,861 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:41:23,862 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:23,959 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-10-13 17:41:23,959 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:23,959 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-10-13 17:41:23,959 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996383176] [2019-10-13 17:41:23,960 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:23,960 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:23,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:23,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:23,961 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-10-13 17:41:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:24,247 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-10-13 17:41:24,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:41:24,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-10-13 17:41:24,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:24,248 INFO L225 Difference]: With dead ends: 99 [2019-10-13 17:41:24,248 INFO L226 Difference]: Without dead ends: 67 [2019-10-13 17:41:24,249 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:41:24,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-13 17:41:24,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-10-13 17:41:24,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-10-13 17:41:24,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-10-13 17:41:24,255 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-10-13 17:41:24,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:24,256 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-10-13 17:41:24,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:24,256 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-10-13 17:41:24,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-10-13 17:41:24,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:24,257 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:24,462 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:24,463 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:24,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-10-13 17:41:24,464 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:24,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411157150] [2019-10-13 17:41:24,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,465 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:24,465 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:24,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:24,628 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-10-13 17:41:24,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411157150] [2019-10-13 17:41:24,629 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527458216] [2019-10-13 17:41:24,629 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 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 [2019-10-13 17:41:24,717 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-13 17:41:24,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:24,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:41:24,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:24,791 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-10-13 17:41:24,791 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:24,791 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-10-13 17:41:24,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575142755] [2019-10-13 17:41:24,792 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:41:24,792 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:24,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:41:24,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,793 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-10-13 17:41:24,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:24,963 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-10-13 17:41:24,963 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:24,963 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-10-13 17:41:24,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:24,964 INFO L225 Difference]: With dead ends: 105 [2019-10-13 17:41:24,964 INFO L226 Difference]: Without dead ends: 71 [2019-10-13 17:41:24,965 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:41:24,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-10-13 17:41:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-10-13 17:41:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-13 17:41:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-10-13 17:41:24,970 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-10-13 17:41:24,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:24,970 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-10-13 17:41:24,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:41:24,971 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-10-13 17:41:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-10-13 17:41:24,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:24,972 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:25,176 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,177 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:25,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:25,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-10-13 17:41:25,178 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:25,178 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854127071] [2019-10-13 17:41:25,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,179 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,179 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:25,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854127071] [2019-10-13 17:41:25,370 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401227998] [2019-10-13 17:41:25,370 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 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 [2019-10-13 17:41:25,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:25,449 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:41:25,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:25,471 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:25,471 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:25,471 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:41:25,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136941690] [2019-10-13 17:41:25,472 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:41:25,472 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:25,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:41:25,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:25,473 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-10-13 17:41:25,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:25,589 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-10-13 17:41:25,590 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:41:25,590 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-10-13 17:41:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:25,591 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:41:25,591 INFO L226 Difference]: Without dead ends: 72 [2019-10-13 17:41:25,592 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:41:25,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-13 17:41:25,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-13 17:41:25,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:41:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-10-13 17:41:25,600 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-10-13 17:41:25,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:25,600 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-10-13 17:41:25,600 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:41:25,601 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-10-13 17:41:25,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-13 17:41:25,602 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:25,602 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:25,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:25,803 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:25,803 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-10-13 17:41:25,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:25,804 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898489410] [2019-10-13 17:41:25,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:25,805 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:26,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898489410] [2019-10-13 17:41:26,027 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973403353] [2019-10-13 17:41:26,027 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 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 [2019-10-13 17:41:26,102 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:26,103 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:26,104 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:41:26,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:26,133 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:26,134 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:26,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:41:26,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561724415] [2019-10-13 17:41:26,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:41:26,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:26,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:41:26,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:26,136 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-10-13 17:41:26,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:26,243 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-10-13 17:41:26,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:41:26,244 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-10-13 17:41:26,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:26,245 INFO L225 Difference]: With dead ends: 110 [2019-10-13 17:41:26,245 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:41:26,246 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:41:26,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:41:26,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-13 17:41:26,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-13 17:41:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-10-13 17:41:26,250 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-10-13 17:41:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:26,251 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-10-13 17:41:26,251 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:41:26,251 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-10-13 17:41:26,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:41:26,252 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:26,252 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:26,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:26,459 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:26,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:26,460 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-10-13 17:41:26,460 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:26,461 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702692766] [2019-10-13 17:41:26,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,461 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:26,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:26,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:26,702 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-10-13 17:41:26,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702692766] [2019-10-13 17:41:26,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105351071] [2019-10-13 17:41:26,703 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 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 [2019-10-13 17:41:26,782 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:41:26,782 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:26,783 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:41:26,785 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-10-13 17:41:26,877 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:26,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-10-13 17:41:26,878 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600111085] [2019-10-13 17:41:26,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:41:26,879 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:26,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:41:26,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:26,880 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-10-13 17:41:27,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:27,116 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-10-13 17:41:27,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:27,116 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-10-13 17:41:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:27,117 INFO L225 Difference]: With dead ends: 115 [2019-10-13 17:41:27,117 INFO L226 Difference]: Without dead ends: 79 [2019-10-13 17:41:27,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:27,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-10-13 17:41:27,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-10-13 17:41:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-10-13 17:41:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-10-13 17:41:27,122 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-10-13 17:41:27,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:27,123 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-10-13 17:41:27,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:41:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-10-13 17:41:27,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-13 17:41:27,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:27,124 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:27,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:27,329 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:27,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:27,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-10-13 17:41:27,330 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:27,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341343930] [2019-10-13 17:41:27,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,331 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:27,331 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:27,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:27,570 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341343930] [2019-10-13 17:41:27,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481055016] [2019-10-13 17:41:27,571 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 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 [2019-10-13 17:41:27,675 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:27,676 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:27,678 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:41:27,681 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:27,711 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:27,711 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:27,712 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:41:27,712 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685640565] [2019-10-13 17:41:27,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:41:27,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:27,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:41:27,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:27,717 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-10-13 17:41:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:27,895 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-10-13 17:41:27,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:41:27,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-10-13 17:41:27,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:27,897 INFO L225 Difference]: With dead ends: 118 [2019-10-13 17:41:27,897 INFO L226 Difference]: Without dead ends: 80 [2019-10-13 17:41:27,898 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:41:27,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-10-13 17:41:27,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-10-13 17:41:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-10-13 17:41:27,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-10-13 17:41:27,904 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-10-13 17:41:27,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:27,904 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-10-13 17:41:27,904 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:41:27,904 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-10-13 17:41:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-13 17:41:27,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:27,906 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:28,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:28,116 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:28,116 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-10-13 17:41:28,116 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:28,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562144057] [2019-10-13 17:41:28,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:28,117 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:28,117 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-10-13 17:41:28,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562144057] [2019-10-13 17:41:28,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145131220] [2019-10-13 17:41:28,369 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 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 [2019-10-13 17:41:29,067 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-10-13 17:41:29,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:29,070 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:29,072 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:29,179 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-10-13 17:41:29,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:29,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-10-13 17:41:29,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328659862] [2019-10-13 17:41:29,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:29,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:29,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:29,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:29,181 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-10-13 17:41:29,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:29,531 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-10-13 17:41:29,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:41:29,537 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-10-13 17:41:29,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:29,538 INFO L225 Difference]: With dead ends: 123 [2019-10-13 17:41:29,538 INFO L226 Difference]: Without dead ends: 85 [2019-10-13 17:41:29,539 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:41:29,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-13 17:41:29,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-10-13 17:41:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-13 17:41:29,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-10-13 17:41:29,544 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-10-13 17:41:29,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:29,544 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-10-13 17:41:29,545 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:29,545 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-10-13 17:41:29,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-10-13 17:41:29,546 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:29,546 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:29,751 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:29,751 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:29,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:29,752 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-10-13 17:41:29,752 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:29,752 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46377381] [2019-10-13 17:41:29,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,753 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:29,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-10-13 17:41:30,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46377381] [2019-10-13 17:41:30,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643754313] [2019-10-13 17:41:30,123 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 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 [2019-10-13 17:41:30,757 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 17:41:30,757 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:30,759 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:41:30,762 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-10-13 17:41:30,866 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:30,866 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-10-13 17:41:30,866 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621054999] [2019-10-13 17:41:30,867 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:41:30,867 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:30,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:41:30,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:30,868 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-10-13 17:41:31,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:31,155 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-10-13 17:41:31,157 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 17:41:31,157 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-10-13 17:41:31,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:31,158 INFO L225 Difference]: With dead ends: 129 [2019-10-13 17:41:31,158 INFO L226 Difference]: Without dead ends: 89 [2019-10-13 17:41:31,159 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:41:31,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-13 17:41:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-10-13 17:41:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-10-13 17:41:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-10-13 17:41:31,170 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-10-13 17:41:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:31,170 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-10-13 17:41:31,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:41:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-10-13 17:41:31,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-10-13 17:41:31,173 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:31,173 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:31,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:31,379 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:31,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:31,379 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-10-13 17:41:31,380 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:31,380 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35356433] [2019-10-13 17:41:31,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,380 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:31,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,681 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:31,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35356433] [2019-10-13 17:41:31,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069887094] [2019-10-13 17:41:31,681 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 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 [2019-10-13 17:41:31,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:31,761 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:41:31,763 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:31,787 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:31,787 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:31,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:41:31,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447711219] [2019-10-13 17:41:31,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:41:31,789 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:31,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:41:31,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:31,789 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-10-13 17:41:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:31,976 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-10-13 17:41:31,976 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:41:31,977 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-10-13 17:41:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:31,978 INFO L225 Difference]: With dead ends: 132 [2019-10-13 17:41:31,978 INFO L226 Difference]: Without dead ends: 90 [2019-10-13 17:41:31,979 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:41:31,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-10-13 17:41:31,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-10-13 17:41:31,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-10-13 17:41:31,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-10-13 17:41:31,984 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-10-13 17:41:31,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:31,985 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-10-13 17:41:31,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:41:31,985 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-10-13 17:41:31,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:41:31,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:31,986 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:32,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:32,190 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:32,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:32,191 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-10-13 17:41:32,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:32,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871275720] [2019-10-13 17:41:32,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:32,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:32,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871275720] [2019-10-13 17:41:32,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103710375] [2019-10-13 17:41:32,489 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 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 [2019-10-13 17:41:32,575 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:32,575 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:32,576 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:41:32,578 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:32,607 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:32,607 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:41:32,608 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094110705] [2019-10-13 17:41:32,608 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:41:32,608 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:32,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:41:32,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:32,609 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-10-13 17:41:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:32,828 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-10-13 17:41:32,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:41:32,829 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-10-13 17:41:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:32,830 INFO L225 Difference]: With dead ends: 134 [2019-10-13 17:41:32,830 INFO L226 Difference]: Without dead ends: 92 [2019-10-13 17:41:32,831 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:41:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-10-13 17:41:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-10-13 17:41:32,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-10-13 17:41:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-10-13 17:41:32,836 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-10-13 17:41:32,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:32,836 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-10-13 17:41:32,836 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:41:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-10-13 17:41:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-10-13 17:41:32,837 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:32,838 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:33,042 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:33,042 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-10-13 17:41:33,043 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:33,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190255385] [2019-10-13 17:41:33,043 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,044 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:33,044 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-10-13 17:41:33,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190255385] [2019-10-13 17:41:33,356 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033945377] [2019-10-13 17:41:33,356 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 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 [2019-10-13 17:41:33,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-13 17:41:33,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:33,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:41:33,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-10-13 17:41:33,699 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:33,700 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-10-13 17:41:33,700 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158966835] [2019-10-13 17:41:33,700 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:41:33,701 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:33,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:41:33,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:33,702 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-10-13 17:41:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:33,975 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-10-13 17:41:33,975 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 17:41:33,976 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-10-13 17:41:33,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:33,977 INFO L225 Difference]: With dead ends: 139 [2019-10-13 17:41:33,977 INFO L226 Difference]: Without dead ends: 97 [2019-10-13 17:41:33,978 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:41:33,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-10-13 17:41:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-10-13 17:41:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-13 17:41:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-10-13 17:41:33,983 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-10-13 17:41:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:33,983 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-10-13 17:41:33,983 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:41:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-10-13 17:41:33,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-10-13 17:41:33,985 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:33,985 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:34,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:34,190 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-10-13 17:41:34,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:34,190 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868387761] [2019-10-13 17:41:34,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:34,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:34,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868387761] [2019-10-13 17:41:34,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863065812] [2019-10-13 17:41:34,558 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 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 [2019-10-13 17:41:34,677 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:34,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:34,680 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:41:34,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:34,716 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:34,716 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:41:34,717 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154356544] [2019-10-13 17:41:34,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:41:34,718 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:34,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:41:34,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:41:34,719 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-10-13 17:41:34,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:34,918 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-10-13 17:41:34,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:41:34,919 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-10-13 17:41:34,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:34,921 INFO L225 Difference]: With dead ends: 142 [2019-10-13 17:41:34,921 INFO L226 Difference]: Without dead ends: 98 [2019-10-13 17:41:34,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:41:34,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-13 17:41:34,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-13 17:41:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-13 17:41:34,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-10-13 17:41:34,930 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-10-13 17:41:34,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:34,931 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-10-13 17:41:34,931 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:41:34,931 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-10-13 17:41:34,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-10-13 17:41:34,932 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:34,933 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:35,136 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:35,137 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:35,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:35,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-10-13 17:41:35,138 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:35,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17461410] [2019-10-13 17:41:35,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:35,139 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:35,139 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-10-13 17:41:35,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17461410] [2019-10-13 17:41:35,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673401762] [2019-10-13 17:41:35,723 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 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 [2019-10-13 17:41:38,550 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-10-13 17:41:38,551 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:38,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:41:38,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:38,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-10-13 17:41:38,772 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:38,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-10-13 17:41:38,772 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449450557] [2019-10-13 17:41:38,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 17:41:38,774 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:38,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 17:41:38,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 17:41:38,775 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-10-13 17:41:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:39,249 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-10-13 17:41:39,249 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 17:41:39,249 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-10-13 17:41:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:39,250 INFO L225 Difference]: With dead ends: 147 [2019-10-13 17:41:39,251 INFO L226 Difference]: Without dead ends: 103 [2019-10-13 17:41:39,252 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-10-13 17:41:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-13 17:41:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-10-13 17:41:39,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-10-13 17:41:39,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-10-13 17:41:39,258 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-10-13 17:41:39,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:39,258 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-10-13 17:41:39,259 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 17:41:39,259 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-10-13 17:41:39,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-10-13 17:41:39,262 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:39,263 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:39,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:39,470 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:39,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:39,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-10-13 17:41:39,471 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:39,471 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497417076] [2019-10-13 17:41:39,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:39,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:39,472 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:40,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-10-13 17:41:40,005 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497417076] [2019-10-13 17:41:40,006 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776024197] [2019-10-13 17:41:40,006 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 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 [2019-10-13 17:41:41,160 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:41:41,161 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:41,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:41:41,165 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-10-13 17:41:41,294 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:41,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-10-13 17:41:41,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502109623] [2019-10-13 17:41:41,295 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:41:41,295 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:41,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:41:41,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:41,296 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-10-13 17:41:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:41,610 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-10-13 17:41:41,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 17:41:41,610 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-10-13 17:41:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:41,611 INFO L225 Difference]: With dead ends: 153 [2019-10-13 17:41:41,612 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 17:41:41,613 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:41:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 17:41:41,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-10-13 17:41:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-13 17:41:41,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-10-13 17:41:41,618 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-10-13 17:41:41,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:41,618 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-10-13 17:41:41,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:41:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-10-13 17:41:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-10-13 17:41:41,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:41,620 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:41,825 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:41,826 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:41,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:41,826 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-10-13 17:41:41,827 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:41,827 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589644028] [2019-10-13 17:41:41,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:41,828 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:41,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:41,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 17:41:42,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589644028] [2019-10-13 17:41:42,326 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123066383] [2019-10-13 17:41:42,327 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 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 [2019-10-13 17:41:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:42,511 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 17:41:42,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:42,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 17:41:42,559 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:42,559 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-13 17:41:42,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772238147] [2019-10-13 17:41:42,560 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:41:42,560 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:42,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:41:42,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:41:42,561 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-10-13 17:41:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:42,844 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-10-13 17:41:42,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 17:41:42,845 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-10-13 17:41:42,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:42,846 INFO L225 Difference]: With dead ends: 156 [2019-10-13 17:41:42,846 INFO L226 Difference]: Without dead ends: 108 [2019-10-13 17:41:42,847 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:41:42,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-13 17:41:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-13 17:41:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-13 17:41:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-10-13 17:41:42,852 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-10-13 17:41:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:42,852 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-10-13 17:41:42,852 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:41:42,852 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-10-13 17:41:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-10-13 17:41:42,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:42,854 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:43,058 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:43,058 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:43,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:43,059 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-10-13 17:41:43,059 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:43,059 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806670870] [2019-10-13 17:41:43,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:43,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:43,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 17:41:43,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806670870] [2019-10-13 17:41:43,590 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6342836] [2019-10-13 17:41:43,590 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 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 [2019-10-13 17:41:43,730 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:41:43,730 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:43,732 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:41:43,735 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 17:41:43,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:43,798 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-13 17:41:43,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210288860] [2019-10-13 17:41:43,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:41:43,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:43,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:41:43,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:43,801 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-10-13 17:41:44,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:44,004 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-10-13 17:41:44,005 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:41:44,005 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-10-13 17:41:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:44,006 INFO L225 Difference]: With dead ends: 158 [2019-10-13 17:41:44,007 INFO L226 Difference]: Without dead ends: 110 [2019-10-13 17:41:44,008 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:41:44,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-13 17:41:44,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-13 17:41:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 17:41:44,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-10-13 17:41:44,016 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-10-13 17:41:44,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:44,016 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-10-13 17:41:44,016 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:41:44,016 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-10-13 17:41:44,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-10-13 17:41:44,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:44,018 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:44,222 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:44,222 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:44,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:44,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-10-13 17:41:44,223 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:44,223 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081479776] [2019-10-13 17:41:44,223 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:44,223 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:44,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-10-13 17:41:44,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081479776] [2019-10-13 17:41:44,695 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632103934] [2019-10-13 17:41:44,695 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 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 [2019-10-13 17:41:44,941 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:41:44,941 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:44,943 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:41:44,946 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-10-13 17:41:45,234 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:45,235 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-10-13 17:41:45,235 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824509856] [2019-10-13 17:41:45,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 17:41:45,236 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 17:41:45,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 17:41:45,237 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-10-13 17:41:45,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:45,818 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-10-13 17:41:45,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 17:41:45,818 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-10-13 17:41:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:45,819 INFO L225 Difference]: With dead ends: 163 [2019-10-13 17:41:45,819 INFO L226 Difference]: Without dead ends: 115 [2019-10-13 17:41:45,822 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-10-13 17:41:45,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-13 17:41:45,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-10-13 17:41:45,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-10-13 17:41:45,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-10-13 17:41:45,827 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-10-13 17:41:45,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:45,827 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-10-13 17:41:45,827 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 17:41:45,827 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-10-13 17:41:45,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-13 17:41:45,828 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:45,829 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:46,032 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:46,033 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:46,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:46,034 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-10-13 17:41:46,034 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:46,034 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716160169] [2019-10-13 17:41:46,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:46,035 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:46,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:46,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-10-13 17:41:46,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716160169] [2019-10-13 17:41:46,523 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576653257] [2019-10-13 17:41:46,523 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:46,652 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:41:46,652 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:41:46,654 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:41:46,657 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:41:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-10-13 17:41:46,897 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:41:46,897 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-13 17:41:46,897 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206156107] [2019-10-13 17:41:46,898 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-13 17:41:46,898 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:41:46,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-13 17:41:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 17:41:46,899 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-10-13 17:41:47,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:41:47,391 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-10-13 17:41:47,391 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-13 17:41:47,391 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-10-13 17:41:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:41:47,393 INFO L225 Difference]: With dead ends: 169 [2019-10-13 17:41:47,393 INFO L226 Difference]: Without dead ends: 119 [2019-10-13 17:41:47,395 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-10-13 17:41:47,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-10-13 17:41:47,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-10-13 17:41:47,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-13 17:41:47,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-10-13 17:41:47,400 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-10-13 17:41:47,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:41:47,401 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-10-13 17:41:47,401 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-13 17:41:47,401 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-10-13 17:41:47,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-10-13 17:41:47,402 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:41:47,402 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:41:47,605 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:41:47,606 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:41:47,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:41:47,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-10-13 17:41:47,607 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:41:47,608 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058708737] [2019-10-13 17:41:47,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:47,608 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:41:47,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:41:47,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:41:48,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-10-13 17:41:48,263 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058708737] [2019-10-13 17:41:48,264 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441582251] [2019-10-13 17:41:48,264 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true