java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:36,222 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:36,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:36,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:36,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:36,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:36,244 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:36,253 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:36,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:36,258 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:36,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:36,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:36,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:36,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:36,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:36,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:36,269 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:36,272 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:36,273 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:36,278 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:36,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:36,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:36,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:36,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:36,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:42:36,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:36,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:36,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:36,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:36,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:36,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:36,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:36,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:36,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:36,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:36,295 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:36,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:42:36,315 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:36,316 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:36,320 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:36,320 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:36,320 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:36,321 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:36,321 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:36,321 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:36,321 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:36,322 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:36,322 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:36,322 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:36,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:36,322 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:36,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:36,323 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:36,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:36,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:36,324 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:36,325 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:36,325 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:36,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:36,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:36,326 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:36,326 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:36,326 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:36,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:36,327 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:36,327 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:36,601 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:36,622 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:36,625 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:36,626 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:36,627 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:36,628 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-10-14 21:42:36,698 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854f50257/7da203ff056a41508f2dfa9a15cd3a47/FLAG5b3d6e034 [2019-10-14 21:42:37,151 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:37,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_ground-1.i [2019-10-14 21:42:37,166 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854f50257/7da203ff056a41508f2dfa9a15cd3a47/FLAG5b3d6e034 [2019-10-14 21:42:37,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/854f50257/7da203ff056a41508f2dfa9a15cd3a47 [2019-10-14 21:42:37,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:37,552 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:37,553 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:37,553 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:37,557 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:37,557 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,560 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@746ac087 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37, skipping insertion in model container [2019-10-14 21:42:37,560 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,567 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:37,582 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:37,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:37,759 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:37,797 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:37,908 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:37,908 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37 WrapperNode [2019-10-14 21:42:37,908 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:37,909 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:37,909 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:37,909 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:37,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,923 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,932 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,933 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,942 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,949 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,951 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... [2019-10-14 21:42:37,954 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:37,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:37,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:37,955 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:37,955 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:38,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:38,012 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:38,012 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:38,012 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:38,012 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:38,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:38,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:38,356 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:38,356 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-14 21:42:38,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:38 BoogieIcfgContainer [2019-10-14 21:42:38,358 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:38,364 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:38,364 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:38,377 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:38,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:37" (1/3) ... [2019-10-14 21:42:38,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cd56db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:38, skipping insertion in model container [2019-10-14 21:42:38,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:37" (2/3) ... [2019-10-14 21:42:38,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38cd56db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:38, skipping insertion in model container [2019-10-14 21:42:38,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:38" (3/3) ... [2019-10-14 21:42:38,381 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_ground-1.i [2019-10-14 21:42:38,389 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:38,395 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:38,407 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:38,436 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:38,436 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:38,436 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:38,436 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:38,436 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:38,436 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:38,437 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:38,437 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-14 21:42:38,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:38,461 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,462 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,463 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2019-10-14 21:42:38,475 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,475 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836279074] [2019-10-14 21:42:38,475 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,476 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:38,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836279074] [2019-10-14 21:42:38,645 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:38,645 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:38,647 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544063534] [2019-10-14 21:42:38,651 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:38,652 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:38,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:38,665 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-14 21:42:38,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:38,845 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-10-14 21:42:38,846 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:38,847 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:42:38,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:38,858 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:42:38,858 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 21:42:38,862 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:38,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 21:42:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 21:42:38,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 21:42:38,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-14 21:42:38,909 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2019-10-14 21:42:38,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:38,909 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-14 21:42:38,910 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:38,910 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-14 21:42:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:38,911 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:38,911 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:38,912 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:38,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:38,912 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2019-10-14 21:42:38,913 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:38,913 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253492627] [2019-10-14 21:42:38,913 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:38,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:38,991 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253492627] [2019-10-14 21:42:38,991 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:38,991 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:38,992 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632987005] [2019-10-14 21:42:38,996 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:38,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:38,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:38,998 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2019-10-14 21:42:39,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,134 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2019-10-14 21:42:39,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:39,134 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:42:39,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,136 INFO L225 Difference]: With dead ends: 74 [2019-10-14 21:42:39,136 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:42:39,138 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:39,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:42:39,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:42:39,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:42:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2019-10-14 21:42:39,149 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 16 [2019-10-14 21:42:39,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,149 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2019-10-14 21:42:39,149 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:39,149 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2019-10-14 21:42:39,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 21:42:39,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,151 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,151 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1609541534, now seen corresponding path program 1 times [2019-10-14 21:42:39,153 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777794911] [2019-10-14 21:42:39,153 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:39,226 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777794911] [2019-10-14 21:42:39,226 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:39,227 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:39,227 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023130904] [2019-10-14 21:42:39,227 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:39,228 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:39,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:39,229 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand 4 states. [2019-10-14 21:42:39,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,400 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2019-10-14 21:42:39,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:39,400 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-10-14 21:42:39,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,402 INFO L225 Difference]: With dead ends: 72 [2019-10-14 21:42:39,402 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:42:39,403 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:39,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:42:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2019-10-14 21:42:39,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 21:42:39,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-14 21:42:39,413 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 18 [2019-10-14 21:42:39,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,414 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-14 21:42:39,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:39,414 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-14 21:42:39,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:39,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,415 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,415 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,416 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2019-10-14 21:42:39,416 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,416 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175356082] [2019-10-14 21:42:39,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,417 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,417 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:39,505 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175356082] [2019-10-14 21:42:39,505 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:39,505 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:39,506 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292410430] [2019-10-14 21:42:39,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:39,508 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:39,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:39,509 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 4 states. [2019-10-14 21:42:39,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,644 INFO L93 Difference]: Finished difference Result 90 states and 119 transitions. [2019-10-14 21:42:39,644 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:39,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-10-14 21:42:39,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,645 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:42:39,646 INFO L226 Difference]: Without dead ends: 59 [2019-10-14 21:42:39,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-10-14 21:42:39,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2019-10-14 21:42:39,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:42:39,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 59 transitions. [2019-10-14 21:42:39,655 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 59 transitions. Word has length 20 [2019-10-14 21:42:39,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,655 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 59 transitions. [2019-10-14 21:42:39,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:39,655 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 59 transitions. [2019-10-14 21:42:39,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:39,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,656 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:39,657 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:39,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:39,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1708190685, now seen corresponding path program 1 times [2019-10-14 21:42:39,658 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:39,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886618799] [2019-10-14 21:42:39,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,658 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:39,658 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:39,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:39,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886618799] [2019-10-14 21:42:39,722 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508023719] [2019-10-14 21:42:39,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:39,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:39,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:39,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:39,811 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:39,811 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:42:39,811 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044008251] [2019-10-14 21:42:39,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:42:39,812 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:39,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:42:39,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:39,813 INFO L87 Difference]: Start difference. First operand 46 states and 59 transitions. Second operand 6 states. [2019-10-14 21:42:39,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:39,913 INFO L93 Difference]: Finished difference Result 86 states and 112 transitions. [2019-10-14 21:42:39,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:42:39,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:42:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:39,914 INFO L225 Difference]: With dead ends: 86 [2019-10-14 21:42:39,914 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 21:42:39,915 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:42:39,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 21:42:39,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-10-14 21:42:39,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 21:42:39,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 61 transitions. [2019-10-14 21:42:39,922 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 61 transitions. Word has length 20 [2019-10-14 21:42:39,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:39,922 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 61 transitions. [2019-10-14 21:42:39,922 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:42:39,923 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 61 transitions. [2019-10-14 21:42:39,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:39,923 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:39,924 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,135 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,136 INFO L82 PathProgramCache]: Analyzing trace with hash 700215557, now seen corresponding path program 2 times [2019-10-14 21:42:40,136 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,136 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8677362] [2019-10-14 21:42:40,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,137 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:40,222 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8677362] [2019-10-14 21:42:40,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113889502] [2019-10-14 21:42:40,223 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,271 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:42:40,272 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:40,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:42:40,297 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:40,297 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2019-10-14 21:42:40,297 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530080945] [2019-10-14 21:42:40,298 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:40,298 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:40,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:40,304 INFO L87 Difference]: Start difference. First operand 48 states and 61 transitions. Second operand 4 states. [2019-10-14 21:42:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,377 INFO L93 Difference]: Finished difference Result 108 states and 145 transitions. [2019-10-14 21:42:40,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:40,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2019-10-14 21:42:40,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,381 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:42:40,381 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:42:40,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:40,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:42:40,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2019-10-14 21:42:40,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 21:42:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 62 transitions. [2019-10-14 21:42:40,398 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 62 transitions. Word has length 22 [2019-10-14 21:42:40,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,399 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 62 transitions. [2019-10-14 21:42:40,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:40,400 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 62 transitions. [2019-10-14 21:42:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:42:40,401 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,401 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:40,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:40,615 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:40,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:40,616 INFO L82 PathProgramCache]: Analyzing trace with hash -159559916, now seen corresponding path program 1 times [2019-10-14 21:42:40,616 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:40,616 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362638013] [2019-10-14 21:42:40,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,617 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:40,617 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:40,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362638013] [2019-10-14 21:42:40,691 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908177257] [2019-10-14 21:42:40,692 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 [2019-10-14 21:42:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:40,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:40,751 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:40,768 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:40,768 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:42:40,768 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865606834] [2019-10-14 21:42:40,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:42:40,769 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:40,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:42:40,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:40,770 INFO L87 Difference]: Start difference. First operand 49 states and 62 transitions. Second operand 7 states. [2019-10-14 21:42:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:40,896 INFO L93 Difference]: Finished difference Result 90 states and 116 transitions. [2019-10-14 21:42:40,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:40,897 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-14 21:42:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:40,897 INFO L225 Difference]: With dead ends: 90 [2019-10-14 21:42:40,898 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 21:42:40,898 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:40,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 21:42:40,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-10-14 21:42:40,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 21:42:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2019-10-14 21:42:40,905 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 25 [2019-10-14 21:42:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:40,905 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2019-10-14 21:42:40,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:42:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2019-10-14 21:42:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:42:40,906 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:40,907 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,109 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,111 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1768902798, now seen corresponding path program 2 times [2019-10-14 21:42:41,112 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,112 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068924254] [2019-10-14 21:42:41,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,113 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,113 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,220 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068924254] [2019-10-14 21:42:41,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550654420] [2019-10-14 21:42:41,221 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,262 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:42:41,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:41,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,265 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:42:41,302 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:41,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-10-14 21:42:41,303 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036941791] [2019-10-14 21:42:41,305 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:41,305 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:41,306 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand 4 states. [2019-10-14 21:42:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,372 INFO L93 Difference]: Finished difference Result 102 states and 135 transitions. [2019-10-14 21:42:41,372 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:41,372 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 21:42:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,373 INFO L225 Difference]: With dead ends: 102 [2019-10-14 21:42:41,374 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 21:42:41,374 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:41,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 21:42:41,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2019-10-14 21:42:41,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:42:41,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 79 transitions. [2019-10-14 21:42:41,388 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 79 transitions. Word has length 27 [2019-10-14 21:42:41,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,388 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 79 transitions. [2019-10-14 21:42:41,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:41,388 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 79 transitions. [2019-10-14 21:42:41,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:42:41,392 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,392 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:41,593 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,593 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:41,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:41,594 INFO L82 PathProgramCache]: Analyzing trace with hash -485006498, now seen corresponding path program 1 times [2019-10-14 21:42:41,594 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:41,595 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259859537] [2019-10-14 21:42:41,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,595 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:41,596 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:41,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,692 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259859537] [2019-10-14 21:42:41,693 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336402106] [2019-10-14 21:42:41,693 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:41,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:41,747 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:41,766 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:41,767 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:41,767 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-10-14 21:42:41,767 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989744395] [2019-10-14 21:42:41,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:41,768 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:41,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:41,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:41,769 INFO L87 Difference]: Start difference. First operand 61 states and 79 transitions. Second operand 8 states. [2019-10-14 21:42:41,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:41,870 INFO L93 Difference]: Finished difference Result 112 states and 148 transitions. [2019-10-14 21:42:41,871 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:42:41,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-10-14 21:42:41,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:41,872 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:42:41,872 INFO L226 Difference]: Without dead ends: 64 [2019-10-14 21:42:41,873 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-10-14 21:42:41,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-10-14 21:42:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:42:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 81 transitions. [2019-10-14 21:42:41,889 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 81 transitions. Word has length 28 [2019-10-14 21:42:41,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:41,890 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 81 transitions. [2019-10-14 21:42:41,890 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:41,890 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 81 transitions. [2019-10-14 21:42:41,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:42:41,891 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:41,891 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,096 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,097 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,098 INFO L82 PathProgramCache]: Analyzing trace with hash 301121088, now seen corresponding path program 2 times [2019-10-14 21:42:42,098 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,099 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816276135] [2019-10-14 21:42:42,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,099 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,099 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,177 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:42,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816276135] [2019-10-14 21:42:42,178 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497866939] [2019-10-14 21:42:42,178 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,218 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:42:42,218 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:42,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,330 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:42,330 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 59 [2019-10-14 21:42:42,332 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,352 INFO L567 ElimStorePlain]: treesize reduction 24, result has 42.9 percent of original size [2019-10-14 21:42:42,353 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,354 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:7 [2019-10-14 21:42:42,377 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:42:42,378 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,380 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:42,380 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:42,381 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:42:42,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:42,413 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-10-14 21:42:42,414 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:42,414 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 14 [2019-10-14 21:42:42,414 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229284985] [2019-10-14 21:42:42,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:42,415 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:42,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-10-14 21:42:42,416 INFO L87 Difference]: Start difference. First operand 63 states and 81 transitions. Second operand 8 states. [2019-10-14 21:42:42,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:42,562 INFO L93 Difference]: Finished difference Result 112 states and 146 transitions. [2019-10-14 21:42:42,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:42,562 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2019-10-14 21:42:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:42,564 INFO L225 Difference]: With dead ends: 112 [2019-10-14 21:42:42,564 INFO L226 Difference]: Without dead ends: 77 [2019-10-14 21:42:42,565 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-10-14 21:42:42,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 70. [2019-10-14 21:42:42,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-10-14 21:42:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2019-10-14 21:42:42,586 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 30 [2019-10-14 21:42:42,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:42,586 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2019-10-14 21:42:42,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:42,586 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2019-10-14 21:42:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:42:42,591 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:42,591 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:42,803 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,803 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash 210042451, now seen corresponding path program 1 times [2019-10-14 21:42:42,804 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:42,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408367840] [2019-10-14 21:42:42,805 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,806 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:42,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:42,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:42:42,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408367840] [2019-10-14 21:42:42,912 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664911295] [2019-10-14 21:42:42,913 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:42,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:42,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:42,955 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:42,981 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:42,981 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:42,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:42:42,982 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240761360] [2019-10-14 21:42:42,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:42:42,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:42,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:42:42,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:42,987 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand 9 states. [2019-10-14 21:42:43,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,125 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2019-10-14 21:42:43,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:42:43,126 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-10-14 21:42:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,129 INFO L225 Difference]: With dead ends: 128 [2019-10-14 21:42:43,129 INFO L226 Difference]: Without dead ends: 73 [2019-10-14 21:42:43,130 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:43,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-10-14 21:42:43,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-10-14 21:42:43,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-10-14 21:42:43,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2019-10-14 21:42:43,137 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 38 [2019-10-14 21:42:43,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,137 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2019-10-14 21:42:43,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:42:43,138 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2019-10-14 21:42:43,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:42:43,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,139 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:43,342 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,343 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,344 INFO L82 PathProgramCache]: Analyzing trace with hash 2120066741, now seen corresponding path program 2 times [2019-10-14 21:42:43,344 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,345 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638019022] [2019-10-14 21:42:43,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,345 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,345 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:42:43,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638019022] [2019-10-14 21:42:43,411 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168172944] [2019-10-14 21:42:43,411 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,460 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:43,461 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:43,461 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,463 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:43,475 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:43,476 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:43,476 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:42:43,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478786884] [2019-10-14 21:42:43,476 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:42:43,476 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:42:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:43,477 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 10 states. [2019-10-14 21:42:43,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:43,597 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2019-10-14 21:42:43,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:42:43,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-10-14 21:42:43,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:43,599 INFO L225 Difference]: With dead ends: 130 [2019-10-14 21:42:43,599 INFO L226 Difference]: Without dead ends: 75 [2019-10-14 21:42:43,600 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:43,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-10-14 21:42:43,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2019-10-14 21:42:43,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-10-14 21:42:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2019-10-14 21:42:43,607 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 40 [2019-10-14 21:42:43,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:43,608 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2019-10-14 21:42:43,608 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:42:43,608 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2019-10-14 21:42:43,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:42:43,608 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:43,609 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:43,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,813 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:43,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:43,813 INFO L82 PathProgramCache]: Analyzing trace with hash -592593257, now seen corresponding path program 3 times [2019-10-14 21:42:43,814 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:43,814 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241237768] [2019-10-14 21:42:43,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,815 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:43,815 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:43,919 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-14 21:42:43,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241237768] [2019-10-14 21:42:43,919 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554068272] [2019-10-14 21:42:43,919 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:43,974 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:42:43,975 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:43,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:43,986 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-10-14 21:42:44,025 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,026 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 13 [2019-10-14 21:42:44,026 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512641027] [2019-10-14 21:42:44,026 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:44,027 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:44,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:44,027 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 13 states. [2019-10-14 21:42:44,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,320 INFO L93 Difference]: Finished difference Result 146 states and 189 transitions. [2019-10-14 21:42:44,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:44,321 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 42 [2019-10-14 21:42:44,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,323 INFO L225 Difference]: With dead ends: 146 [2019-10-14 21:42:44,323 INFO L226 Difference]: Without dead ends: 91 [2019-10-14 21:42:44,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=125, Invalid=337, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-10-14 21:42:44,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 81. [2019-10-14 21:42:44,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-10-14 21:42:44,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 100 transitions. [2019-10-14 21:42:44,331 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 100 transitions. Word has length 42 [2019-10-14 21:42:44,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,331 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 100 transitions. [2019-10-14 21:42:44,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:44,331 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 100 transitions. [2019-10-14 21:42:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 21:42:44,332 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,332 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:44,536 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,536 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash 776355378, now seen corresponding path program 4 times [2019-10-14 21:42:44,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:44,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904505028] [2019-10-14 21:42:44,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:44,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:44,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:42:44,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904505028] [2019-10-14 21:42:44,670 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935623225] [2019-10-14 21:42:44,670 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:44,719 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:44,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:44,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:44,722 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:44,733 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:44,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:44,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:42:44,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949044054] [2019-10-14 21:42:44,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:42:44,735 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:44,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:42:44,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:44,735 INFO L87 Difference]: Start difference. First operand 81 states and 100 transitions. Second operand 12 states. [2019-10-14 21:42:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:44,885 INFO L93 Difference]: Finished difference Result 144 states and 182 transitions. [2019-10-14 21:42:44,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:44,886 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2019-10-14 21:42:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:44,887 INFO L225 Difference]: With dead ends: 144 [2019-10-14 21:42:44,887 INFO L226 Difference]: Without dead ends: 84 [2019-10-14 21:42:44,888 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:42:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2019-10-14 21:42:44,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2019-10-14 21:42:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-10-14 21:42:44,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 102 transitions. [2019-10-14 21:42:44,895 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 102 transitions. Word has length 47 [2019-10-14 21:42:44,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:44,895 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 102 transitions. [2019-10-14 21:42:44,895 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:42:44,896 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 102 transitions. [2019-10-14 21:42:44,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 21:42:44,896 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:44,896 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,100 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,101 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash 96986128, now seen corresponding path program 5 times [2019-10-14 21:42:45,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717174217] [2019-10-14 21:42:45,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,230 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:42:45,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717174217] [2019-10-14 21:42:45,230 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773792402] [2019-10-14 21:42:45,230 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,299 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-10-14 21:42:45,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:45,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:45,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:42:45,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269150760] [2019-10-14 21:42:45,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:42:45,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:42:45,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:45,315 INFO L87 Difference]: Start difference. First operand 83 states and 102 transitions. Second operand 13 states. [2019-10-14 21:42:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:45,424 INFO L93 Difference]: Finished difference Result 146 states and 184 transitions. [2019-10-14 21:42:45,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:42:45,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2019-10-14 21:42:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:45,426 INFO L225 Difference]: With dead ends: 146 [2019-10-14 21:42:45,426 INFO L226 Difference]: Without dead ends: 86 [2019-10-14 21:42:45,426 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:42:45,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-10-14 21:42:45,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-10-14 21:42:45,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-10-14 21:42:45,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 104 transitions. [2019-10-14 21:42:45,432 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 104 transitions. Word has length 49 [2019-10-14 21:42:45,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:45,432 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 104 transitions. [2019-10-14 21:42:45,433 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:42:45,433 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 104 transitions. [2019-10-14 21:42:45,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 21:42:45,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:45,433 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:45,637 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,637 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:45,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:45,638 INFO L82 PathProgramCache]: Analyzing trace with hash 58165870, now seen corresponding path program 6 times [2019-10-14 21:42:45,638 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:45,638 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914559021] [2019-10-14 21:42:45,638 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,639 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:45,639 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:45,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:45,741 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:42:45,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914559021] [2019-10-14 21:42:45,742 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337769263] [2019-10-14 21:42:45,742 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:45,800 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-10-14 21:42:45,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:45,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:45,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-10-14 21:42:45,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:45,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2019-10-14 21:42:45,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320607292] [2019-10-14 21:42:45,862 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:45,862 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:45,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:45,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:45,863 INFO L87 Difference]: Start difference. First operand 85 states and 104 transitions. Second operand 17 states. [2019-10-14 21:42:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,310 INFO L93 Difference]: Finished difference Result 163 states and 209 transitions. [2019-10-14 21:42:46,310 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:46,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 51 [2019-10-14 21:42:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,311 INFO L225 Difference]: With dead ends: 163 [2019-10-14 21:42:46,311 INFO L226 Difference]: Without dead ends: 103 [2019-10-14 21:42:46,313 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=227, Invalid=643, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:42:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-10-14 21:42:46,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 93. [2019-10-14 21:42:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-10-14 21:42:46,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 114 transitions. [2019-10-14 21:42:46,320 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 114 transitions. Word has length 51 [2019-10-14 21:42:46,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,320 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 114 transitions. [2019-10-14 21:42:46,320 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:46,321 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 114 transitions. [2019-10-14 21:42:46,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-10-14 21:42:46,321 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,321 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:46,525 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,525 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:46,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1263037951, now seen corresponding path program 7 times [2019-10-14 21:42:46,526 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:46,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628141559] [2019-10-14 21:42:46,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,527 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:46,527 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,653 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:42:46,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628141559] [2019-10-14 21:42:46,654 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361666919] [2019-10-14 21:42:46,654 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:46,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:46,716 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:42:46,719 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:46,740 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:46,741 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:46,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:42:46,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862560826] [2019-10-14 21:42:46,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:42:46,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:46,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:42:46,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:46,744 INFO L87 Difference]: Start difference. First operand 93 states and 114 transitions. Second operand 15 states. [2019-10-14 21:42:46,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:46,935 INFO L93 Difference]: Finished difference Result 162 states and 204 transitions. [2019-10-14 21:42:46,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:42:46,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 56 [2019-10-14 21:42:46,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:46,936 INFO L225 Difference]: With dead ends: 162 [2019-10-14 21:42:46,936 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 21:42:46,937 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:46,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 21:42:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2019-10-14 21:42:46,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-10-14 21:42:46,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 116 transitions. [2019-10-14 21:42:46,944 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 116 transitions. Word has length 56 [2019-10-14 21:42:46,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:46,945 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 116 transitions. [2019-10-14 21:42:46,945 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:42:46,945 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 116 transitions. [2019-10-14 21:42:46,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:42:46,946 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:46,946 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,152 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,152 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2105507359, now seen corresponding path program 8 times [2019-10-14 21:42:47,153 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,153 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412355463] [2019-10-14 21:42:47,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:42:47,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412355463] [2019-10-14 21:42:47,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222990541] [2019-10-14 21:42:47,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:47,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:47,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:42:47,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:47,431 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:42:47,431 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:47,431 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:42:47,432 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006138313] [2019-10-14 21:42:47,434 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:42:47,434 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:47,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:42:47,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:47,435 INFO L87 Difference]: Start difference. First operand 95 states and 116 transitions. Second operand 16 states. [2019-10-14 21:42:47,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:47,551 INFO L93 Difference]: Finished difference Result 164 states and 206 transitions. [2019-10-14 21:42:47,551 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:42:47,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2019-10-14 21:42:47,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:47,553 INFO L225 Difference]: With dead ends: 164 [2019-10-14 21:42:47,553 INFO L226 Difference]: Without dead ends: 98 [2019-10-14 21:42:47,554 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:42:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-10-14 21:42:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-10-14 21:42:47,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-10-14 21:42:47,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2019-10-14 21:42:47,566 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 58 [2019-10-14 21:42:47,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:47,569 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2019-10-14 21:42:47,570 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:42:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2019-10-14 21:42:47,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-10-14 21:42:47,571 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:47,571 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:47,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,776 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash -872209085, now seen corresponding path program 9 times [2019-10-14 21:42:47,777 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:47,777 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576895834] [2019-10-14 21:42:47,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,778 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:47,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-14 21:42:47,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576895834] [2019-10-14 21:42:47,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174107471] [2019-10-14 21:42:47,936 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:47,996 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 21:42:47,996 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:47,997 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:47,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:48,079 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2019-10-14 21:42:48,080 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:48,080 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7] total 21 [2019-10-14 21:42:48,080 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010318329] [2019-10-14 21:42:48,081 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:42:48,081 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:48,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:42:48,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:48,081 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand 21 states. [2019-10-14 21:42:48,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:48,733 INFO L93 Difference]: Finished difference Result 181 states and 231 transitions. [2019-10-14 21:42:48,733 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:48,733 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 60 [2019-10-14 21:42:48,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:48,734 INFO L225 Difference]: With dead ends: 181 [2019-10-14 21:42:48,735 INFO L226 Difference]: Without dead ends: 115 [2019-10-14 21:42:48,736 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=1047, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 21:42:48,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-10-14 21:42:48,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 105. [2019-10-14 21:42:48,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-10-14 21:42:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 128 transitions. [2019-10-14 21:42:48,742 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 128 transitions. Word has length 60 [2019-10-14 21:42:48,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:48,742 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 128 transitions. [2019-10-14 21:42:48,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:42:48,742 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 128 transitions. [2019-10-14 21:42:48,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 21:42:48,743 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:48,743 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:48,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:48,947 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:48,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:48,947 INFO L82 PathProgramCache]: Analyzing trace with hash 26602630, now seen corresponding path program 10 times [2019-10-14 21:42:48,948 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:48,948 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270302156] [2019-10-14 21:42:48,948 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,949 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:48,949 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:48,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,122 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 2 proven. 169 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:42:49,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270302156] [2019-10-14 21:42:49,122 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661024343] [2019-10-14 21:42:49,123 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,190 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:49,191 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:49,192 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,194 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:42:49,229 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,229 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:42:49,230 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126360029] [2019-10-14 21:42:49,231 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:42:49,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:42:49,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:49,231 INFO L87 Difference]: Start difference. First operand 105 states and 128 transitions. Second operand 18 states. [2019-10-14 21:42:49,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:49,398 INFO L93 Difference]: Finished difference Result 180 states and 226 transitions. [2019-10-14 21:42:49,398 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:49,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 65 [2019-10-14 21:42:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:49,400 INFO L225 Difference]: With dead ends: 180 [2019-10-14 21:42:49,400 INFO L226 Difference]: Without dead ends: 108 [2019-10-14 21:42:49,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:42:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-10-14 21:42:49,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-10-14 21:42:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-10-14 21:42:49,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 130 transitions. [2019-10-14 21:42:49,408 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 130 transitions. Word has length 65 [2019-10-14 21:42:49,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:49,409 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 130 transitions. [2019-10-14 21:42:49,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:42:49,409 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 130 transitions. [2019-10-14 21:42:49,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-14 21:42:49,410 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:49,410 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:49,614 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,615 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:49,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:49,615 INFO L82 PathProgramCache]: Analyzing trace with hash -2053564700, now seen corresponding path program 11 times [2019-10-14 21:42:49,615 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:49,615 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029442939] [2019-10-14 21:42:49,615 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,616 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:49,616 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:49,786 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 2 proven. 196 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:42:49,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029442939] [2019-10-14 21:42:49,787 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143701567] [2019-10-14 21:42:49,787 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:49,938 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-14 21:42:49,938 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:49,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:42:49,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-10-14 21:42:49,962 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:49,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:42:49,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214554997] [2019-10-14 21:42:49,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:49,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:49,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:49,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:49,965 INFO L87 Difference]: Start difference. First operand 107 states and 130 transitions. Second operand 19 states. [2019-10-14 21:42:50,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:50,082 INFO L93 Difference]: Finished difference Result 182 states and 228 transitions. [2019-10-14 21:42:50,082 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:50,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 67 [2019-10-14 21:42:50,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:50,083 INFO L225 Difference]: With dead ends: 182 [2019-10-14 21:42:50,084 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 21:42:50,084 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:50,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 21:42:50,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-10-14 21:42:50,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:42:50,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2019-10-14 21:42:50,092 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 67 [2019-10-14 21:42:50,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:50,093 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2019-10-14 21:42:50,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:50,093 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2019-10-14 21:42:50,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-14 21:42:50,094 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:50,094 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:50,299 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,299 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:50,300 INFO L82 PathProgramCache]: Analyzing trace with hash 360391106, now seen corresponding path program 12 times [2019-10-14 21:42:50,300 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:50,301 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375920151] [2019-10-14 21:42:50,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,301 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:50,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:50,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:50,514 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 2 proven. 225 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2019-10-14 21:42:50,514 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375920151] [2019-10-14 21:42:50,515 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753323180] [2019-10-14 21:42:50,515 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:50,610 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-10-14 21:42:50,610 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:50,611 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:42:50,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:50,713 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2019-10-14 21:42:50,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:50,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2019-10-14 21:42:50,714 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098187846] [2019-10-14 21:42:50,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:42:50,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:50,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:42:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:50,715 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 25 states. [2019-10-14 21:42:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:51,387 INFO L93 Difference]: Finished difference Result 199 states and 253 transitions. [2019-10-14 21:42:51,389 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 21:42:51,389 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 69 [2019-10-14 21:42:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:51,391 INFO L225 Difference]: With dead ends: 199 [2019-10-14 21:42:51,392 INFO L226 Difference]: Without dead ends: 127 [2019-10-14 21:42:51,393 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=521, Invalid=1549, Unknown=0, NotChecked=0, Total=2070 [2019-10-14 21:42:51,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-14 21:42:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 117. [2019-10-14 21:42:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-10-14 21:42:51,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2019-10-14 21:42:51,399 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 69 [2019-10-14 21:42:51,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:51,399 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2019-10-14 21:42:51,400 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:42:51,400 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2019-10-14 21:42:51,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-14 21:42:51,400 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:51,401 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:51,604 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:51,605 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:51,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:51,605 INFO L82 PathProgramCache]: Analyzing trace with hash 390599083, now seen corresponding path program 13 times [2019-10-14 21:42:51,606 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:51,606 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260837564] [2019-10-14 21:42:51,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,607 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:51,607 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,809 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 2 proven. 256 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:42:51,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260837564] [2019-10-14 21:42:51,810 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331487668] [2019-10-14 21:42:51,810 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:51,896 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:42:51,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:51,925 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:42:51,925 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:51,925 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:42:51,925 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480683171] [2019-10-14 21:42:51,926 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:42:51,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:51,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:42:51,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:51,927 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand 21 states. [2019-10-14 21:42:52,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:52,093 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2019-10-14 21:42:52,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:42:52,094 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 74 [2019-10-14 21:42:52,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:52,095 INFO L225 Difference]: With dead ends: 198 [2019-10-14 21:42:52,095 INFO L226 Difference]: Without dead ends: 120 [2019-10-14 21:42:52,096 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:52,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-10-14 21:42:52,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2019-10-14 21:42:52,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 21:42:52,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 144 transitions. [2019-10-14 21:42:52,102 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 144 transitions. Word has length 74 [2019-10-14 21:42:52,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:52,102 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 144 transitions. [2019-10-14 21:42:52,102 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:42:52,102 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 144 transitions. [2019-10-14 21:42:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-10-14 21:42:52,103 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:52,103 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:52,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,310 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:52,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:52,310 INFO L82 PathProgramCache]: Analyzing trace with hash 640397581, now seen corresponding path program 14 times [2019-10-14 21:42:52,311 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:52,311 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276363526] [2019-10-14 21:42:52,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,311 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,312 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:52,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 289 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:42:52,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276363526] [2019-10-14 21:42:52,537 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50373722] [2019-10-14 21:42:52,537 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,625 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:52,625 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:52,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:42:52,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:52,657 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:42:52,657 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:52,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:42:52,658 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257419745] [2019-10-14 21:42:52,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:42:52,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:52,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:42:52,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:52,659 INFO L87 Difference]: Start difference. First operand 119 states and 144 transitions. Second operand 22 states. [2019-10-14 21:42:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:52,773 INFO L93 Difference]: Finished difference Result 200 states and 250 transitions. [2019-10-14 21:42:52,775 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:42:52,776 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2019-10-14 21:42:52,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:52,777 INFO L225 Difference]: With dead ends: 200 [2019-10-14 21:42:52,777 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 21:42:52,778 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:42:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 21:42:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2019-10-14 21:42:52,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-10-14 21:42:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 146 transitions. [2019-10-14 21:42:52,784 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 146 transitions. Word has length 76 [2019-10-14 21:42:52,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:52,784 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 146 transitions. [2019-10-14 21:42:52,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:42:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 146 transitions. [2019-10-14 21:42:52,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:42:52,785 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:52,785 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:52,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:52,990 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:52,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:52,990 INFO L82 PathProgramCache]: Analyzing trace with hash 178585583, now seen corresponding path program 15 times [2019-10-14 21:42:52,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:52,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035800919] [2019-10-14 21:42:52,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:52,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 2 proven. 324 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-10-14 21:42:53,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035800919] [2019-10-14 21:42:53,245 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429086007] [2019-10-14 21:42:53,245 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:53,317 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:42:53,317 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:53,318 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:53,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 328 trivial. 0 not checked. [2019-10-14 21:42:53,416 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:53,417 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 29 [2019-10-14 21:42:53,417 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83324259] [2019-10-14 21:42:53,417 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 21:42:53,417 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:53,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 21:42:53,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2019-10-14 21:42:53,418 INFO L87 Difference]: Start difference. First operand 121 states and 146 transitions. Second operand 29 states. [2019-10-14 21:42:54,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,063 INFO L93 Difference]: Finished difference Result 217 states and 275 transitions. [2019-10-14 21:42:54,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:42:54,063 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 78 [2019-10-14 21:42:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,065 INFO L225 Difference]: With dead ends: 217 [2019-10-14 21:42:54,065 INFO L226 Difference]: Without dead ends: 139 [2019-10-14 21:42:54,068 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=713, Invalid=2149, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 21:42:54,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-10-14 21:42:54,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2019-10-14 21:42:54,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-10-14 21:42:54,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2019-10-14 21:42:54,078 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 78 [2019-10-14 21:42:54,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,079 INFO L462 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2019-10-14 21:42:54,079 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 21:42:54,079 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2019-10-14 21:42:54,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:42:54,081 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,081 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:54,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,286 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:54,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:54,286 INFO L82 PathProgramCache]: Analyzing trace with hash 212109018, now seen corresponding path program 16 times [2019-10-14 21:42:54,287 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:54,287 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465022492] [2019-10-14 21:42:54,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,288 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:54,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:54,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 2 proven. 361 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:54,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465022492] [2019-10-14 21:42:54,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712398915] [2019-10-14 21:42:54,572 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:54,656 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:42:54,656 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:54,658 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:42:54,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:42:54,679 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:54,680 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:42:54,680 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844205572] [2019-10-14 21:42:54,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:42:54,680 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:54,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:42:54,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:54,681 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand 24 states. [2019-10-14 21:42:54,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:54,841 INFO L93 Difference]: Finished difference Result 216 states and 270 transitions. [2019-10-14 21:42:54,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:42:54,841 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 83 [2019-10-14 21:42:54,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:54,842 INFO L225 Difference]: With dead ends: 216 [2019-10-14 21:42:54,842 INFO L226 Difference]: Without dead ends: 132 [2019-10-14 21:42:54,843 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:42:54,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-10-14 21:42:54,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-10-14 21:42:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-10-14 21:42:54,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 158 transitions. [2019-10-14 21:42:54,851 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 158 transitions. Word has length 83 [2019-10-14 21:42:54,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:54,851 INFO L462 AbstractCegarLoop]: Abstraction has 131 states and 158 transitions. [2019-10-14 21:42:54,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:42:54,851 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 158 transitions. [2019-10-14 21:42:54,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-14 21:42:54,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:54,852 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:55,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,056 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:55,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash 780211640, now seen corresponding path program 17 times [2019-10-14 21:42:55,057 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:55,057 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607917634] [2019-10-14 21:42:55,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:55,058 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:55,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 2 proven. 400 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:55,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607917634] [2019-10-14 21:42:55,451 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519086720] [2019-10-14 21:42:55,452 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:55,904 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-14 21:42:55,904 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:55,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:42:55,908 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:55,941 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-10-14 21:42:55,942 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:55,942 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:42:55,942 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784477981] [2019-10-14 21:42:55,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:42:55,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:55,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:42:55,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:55,943 INFO L87 Difference]: Start difference. First operand 131 states and 158 transitions. Second operand 25 states. [2019-10-14 21:42:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:56,087 INFO L93 Difference]: Finished difference Result 218 states and 272 transitions. [2019-10-14 21:42:56,087 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:42:56,088 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 85 [2019-10-14 21:42:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:56,089 INFO L225 Difference]: With dead ends: 218 [2019-10-14 21:42:56,089 INFO L226 Difference]: Without dead ends: 134 [2019-10-14 21:42:56,091 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:42:56,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-14 21:42:56,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2019-10-14 21:42:56,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2019-10-14 21:42:56,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 160 transitions. [2019-10-14 21:42:56,100 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 160 transitions. Word has length 85 [2019-10-14 21:42:56,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:56,100 INFO L462 AbstractCegarLoop]: Abstraction has 133 states and 160 transitions. [2019-10-14 21:42:56,100 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:42:56,100 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 160 transitions. [2019-10-14 21:42:56,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 21:42:56,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:56,101 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:56,305 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,306 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:56,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:56,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1265984790, now seen corresponding path program 18 times [2019-10-14 21:42:56,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:56,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944235343] [2019-10-14 21:42:56,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,307 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:56,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:56,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:56,583 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 2 proven. 441 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2019-10-14 21:42:56,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944235343] [2019-10-14 21:42:56,584 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081122553] [2019-10-14 21:42:56,584 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:56,809 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 21:42:56,810 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:56,811 INFO L256 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:56,813 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:56,946 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2019-10-14 21:42:56,946 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:56,946 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 10] total 33 [2019-10-14 21:42:56,947 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556894348] [2019-10-14 21:42:56,947 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:42:56,947 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:56,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:42:56,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=741, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:42:56,948 INFO L87 Difference]: Start difference. First operand 133 states and 160 transitions. Second operand 33 states. [2019-10-14 21:42:57,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:57,814 INFO L93 Difference]: Finished difference Result 235 states and 297 transitions. [2019-10-14 21:42:57,814 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:42:57,814 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 87 [2019-10-14 21:42:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:57,815 INFO L225 Difference]: With dead ends: 235 [2019-10-14 21:42:57,815 INFO L226 Difference]: Without dead ends: 151 [2019-10-14 21:42:57,817 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=935, Invalid=2847, Unknown=0, NotChecked=0, Total=3782 [2019-10-14 21:42:57,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2019-10-14 21:42:57,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 141. [2019-10-14 21:42:57,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2019-10-14 21:42:57,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 170 transitions. [2019-10-14 21:42:57,826 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 170 transitions. Word has length 87 [2019-10-14 21:42:57,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:57,826 INFO L462 AbstractCegarLoop]: Abstraction has 141 states and 170 transitions. [2019-10-14 21:42:57,826 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:42:57,826 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 170 transitions. [2019-10-14 21:42:57,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-14 21:42:57,827 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:57,827 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:58,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:58,031 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:58,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash 936225111, now seen corresponding path program 19 times [2019-10-14 21:42:58,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:58,032 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032891485] [2019-10-14 21:42:58,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,033 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,347 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 2 proven. 484 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:42:58,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032891485] [2019-10-14 21:42:58,348 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114450937] [2019-10-14 21:42:58,348 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:58,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:42:58,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:58,472 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 21:42:58,472 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:58,472 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:42:58,472 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388730132] [2019-10-14 21:42:58,473 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:42:58,473 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:58,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:42:58,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:58,474 INFO L87 Difference]: Start difference. First operand 141 states and 170 transitions. Second operand 27 states. [2019-10-14 21:42:58,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:58,698 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2019-10-14 21:42:58,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:42:58,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 92 [2019-10-14 21:42:58,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:58,700 INFO L225 Difference]: With dead ends: 234 [2019-10-14 21:42:58,700 INFO L226 Difference]: Without dead ends: 144 [2019-10-14 21:42:58,701 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:42:58,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2019-10-14 21:42:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2019-10-14 21:42:58,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-10-14 21:42:58,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 172 transitions. [2019-10-14 21:42:58,708 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 172 transitions. Word has length 92 [2019-10-14 21:42:58,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:58,708 INFO L462 AbstractCegarLoop]: Abstraction has 143 states and 172 transitions. [2019-10-14 21:42:58,708 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:42:58,708 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 172 transitions. [2019-10-14 21:42:58,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-10-14 21:42:58,709 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:58,709 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:58,912 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:58,913 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 31519801, now seen corresponding path program 20 times [2019-10-14 21:42:58,914 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:58,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454950227] [2019-10-14 21:42:58,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,914 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:58,914 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:58,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:59,242 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 2 proven. 529 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:42:59,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454950227] [2019-10-14 21:42:59,243 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257900557] [2019-10-14 21:42:59,243 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:59,330 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:59,330 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:59,331 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:42:59,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:59,355 INFO L134 CoverageAnalysis]: Checked inductivity of 603 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 21:42:59,355 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:59,355 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:42:59,355 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336684151] [2019-10-14 21:42:59,356 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:42:59,356 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:59,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:42:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:59,357 INFO L87 Difference]: Start difference. First operand 143 states and 172 transitions. Second operand 28 states. [2019-10-14 21:42:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:59,608 INFO L93 Difference]: Finished difference Result 236 states and 294 transitions. [2019-10-14 21:42:59,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:42:59,609 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 94 [2019-10-14 21:42:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:59,610 INFO L225 Difference]: With dead ends: 236 [2019-10-14 21:42:59,611 INFO L226 Difference]: Without dead ends: 146 [2019-10-14 21:42:59,612 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:59,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-10-14 21:42:59,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2019-10-14 21:42:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2019-10-14 21:42:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 174 transitions. [2019-10-14 21:42:59,619 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 174 transitions. Word has length 94 [2019-10-14 21:42:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:59,620 INFO L462 AbstractCegarLoop]: Abstraction has 145 states and 174 transitions. [2019-10-14 21:42:59,620 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:42:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 174 transitions. [2019-10-14 21:42:59,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 21:42:59,621 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:59,621 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:59,824 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:59,825 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1806889317, now seen corresponding path program 21 times [2019-10-14 21:42:59,826 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:59,826 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296472268] [2019-10-14 21:42:59,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,826 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:59,827 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 2 proven. 576 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:43:00,248 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296472268] [2019-10-14 21:43:00,249 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983390580] [2019-10-14 21:43:00,249 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:00,370 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-10-14 21:43:00,370 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:00,371 INFO L256 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:43:00,373 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:00,569 INFO L134 CoverageAnalysis]: Checked inductivity of 650 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 580 trivial. 0 not checked. [2019-10-14 21:43:00,570 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:00,570 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 11] total 37 [2019-10-14 21:43:00,570 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892040820] [2019-10-14 21:43:00,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:43:00,571 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:00,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:43:00,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=933, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:43:00,572 INFO L87 Difference]: Start difference. First operand 145 states and 174 transitions. Second operand 37 states. [2019-10-14 21:43:01,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:01,665 INFO L93 Difference]: Finished difference Result 253 states and 319 transitions. [2019-10-14 21:43:01,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 21:43:01,666 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 96 [2019-10-14 21:43:01,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:01,667 INFO L225 Difference]: With dead ends: 253 [2019-10-14 21:43:01,667 INFO L226 Difference]: Without dead ends: 163 [2019-10-14 21:43:01,669 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1187, Invalid=3643, Unknown=0, NotChecked=0, Total=4830 [2019-10-14 21:43:01,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-10-14 21:43:01,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 153. [2019-10-14 21:43:01,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-10-14 21:43:01,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 184 transitions. [2019-10-14 21:43:01,675 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 184 transitions. Word has length 96 [2019-10-14 21:43:01,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:01,675 INFO L462 AbstractCegarLoop]: Abstraction has 153 states and 184 transitions. [2019-10-14 21:43:01,675 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:43:01,675 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 184 transitions. [2019-10-14 21:43:01,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:43:01,676 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:01,676 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:01,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:01,877 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:01,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:01,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1003991762, now seen corresponding path program 22 times [2019-10-14 21:43:01,878 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:01,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040460004] [2019-10-14 21:43:01,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:01,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:01,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:02,276 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 2 proven. 625 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 21:43:02,276 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040460004] [2019-10-14 21:43:02,277 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632488097] [2019-10-14 21:43:02,277 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:02,381 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:02,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:02,383 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:43:02,384 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 21:43:02,400 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:02,400 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:43:02,400 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213824621] [2019-10-14 21:43:02,401 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:43:02,401 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:02,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:43:02,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:43:02,402 INFO L87 Difference]: Start difference. First operand 153 states and 184 transitions. Second operand 30 states. [2019-10-14 21:43:02,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:02,676 INFO L93 Difference]: Finished difference Result 252 states and 314 transitions. [2019-10-14 21:43:02,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:43:02,677 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 101 [2019-10-14 21:43:02,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:02,679 INFO L225 Difference]: With dead ends: 252 [2019-10-14 21:43:02,679 INFO L226 Difference]: Without dead ends: 156 [2019-10-14 21:43:02,680 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:43:02,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-10-14 21:43:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2019-10-14 21:43:02,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2019-10-14 21:43:02,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 186 transitions. [2019-10-14 21:43:02,690 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 186 transitions. Word has length 101 [2019-10-14 21:43:02,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:02,691 INFO L462 AbstractCegarLoop]: Abstraction has 155 states and 186 transitions. [2019-10-14 21:43:02,691 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:43:02,691 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 186 transitions. [2019-10-14 21:43:02,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-10-14 21:43:02,692 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:02,693 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:02,898 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:02,898 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:02,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:02,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2097274740, now seen corresponding path program 23 times [2019-10-14 21:43:02,899 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:02,899 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860010614] [2019-10-14 21:43:02,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:02,899 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:02,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:03,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:03,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:03,364 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 2 proven. 676 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 21:43:03,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860010614] [2019-10-14 21:43:03,365 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159215100] [2019-10-14 21:43:03,365 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:04,284 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2019-10-14 21:43:04,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:04,288 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:43:04,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:04,312 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 21:43:04,312 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:04,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-10-14 21:43:04,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297316973] [2019-10-14 21:43:04,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:43:04,313 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:43:04,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:43:04,314 INFO L87 Difference]: Start difference. First operand 155 states and 186 transitions. Second operand 31 states. [2019-10-14 21:43:04,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:04,483 INFO L93 Difference]: Finished difference Result 254 states and 316 transitions. [2019-10-14 21:43:04,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 21:43:04,483 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 103 [2019-10-14 21:43:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:04,485 INFO L225 Difference]: With dead ends: 254 [2019-10-14 21:43:04,485 INFO L226 Difference]: Without dead ends: 158 [2019-10-14 21:43:04,487 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:43:04,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2019-10-14 21:43:04,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2019-10-14 21:43:04,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-14 21:43:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 188 transitions. [2019-10-14 21:43:04,493 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 188 transitions. Word has length 103 [2019-10-14 21:43:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:04,494 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 188 transitions. [2019-10-14 21:43:04,494 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:43:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 188 transitions. [2019-10-14 21:43:04,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2019-10-14 21:43:04,495 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:04,495 INFO L380 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:04,700 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:04,701 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:04,701 INFO L82 PathProgramCache]: Analyzing trace with hash -475229078, now seen corresponding path program 24 times [2019-10-14 21:43:04,702 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:04,702 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776316813] [2019-10-14 21:43:04,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:04,703 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:04,703 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:05,189 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 2 proven. 729 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 21:43:05,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776316813] [2019-10-14 21:43:05,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856925312] [2019-10-14 21:43:05,189 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:05,685 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:43:05,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:05,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-14 21:43:05,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:05,859 INFO L134 CoverageAnalysis]: Checked inductivity of 825 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2019-10-14 21:43:05,859 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:05,859 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 12] total 41 [2019-10-14 21:43:05,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153427425] [2019-10-14 21:43:05,860 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 21:43:05,860 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:05,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 21:43:05,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=1147, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 21:43:05,861 INFO L87 Difference]: Start difference. First operand 157 states and 188 transitions. Second operand 41 states. [2019-10-14 21:43:07,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:07,109 INFO L93 Difference]: Finished difference Result 271 states and 341 transitions. [2019-10-14 21:43:07,110 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 21:43:07,110 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 105 [2019-10-14 21:43:07,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:07,112 INFO L225 Difference]: With dead ends: 271 [2019-10-14 21:43:07,112 INFO L226 Difference]: Without dead ends: 175 [2019-10-14 21:43:07,116 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1469, Invalid=4537, Unknown=0, NotChecked=0, Total=6006 [2019-10-14 21:43:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-10-14 21:43:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 165. [2019-10-14 21:43:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-10-14 21:43:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 198 transitions. [2019-10-14 21:43:07,122 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 198 transitions. Word has length 105 [2019-10-14 21:43:07,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:07,123 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 198 transitions. [2019-10-14 21:43:07,123 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 21:43:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 198 transitions. [2019-10-14 21:43:07,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-10-14 21:43:07,124 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:07,124 INFO L380 BasicCegarLoop]: trace histogram [28, 28, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:07,328 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:07,328 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:07,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:07,329 INFO L82 PathProgramCache]: Analyzing trace with hash -14486269, now seen corresponding path program 25 times [2019-10-14 21:43:07,329 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:07,329 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755797144] [2019-10-14 21:43:07,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,329 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:07,330 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:07,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 2 proven. 784 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-14 21:43:07,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755797144] [2019-10-14 21:43:07,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221934241] [2019-10-14 21:43:07,761 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 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 [2019-10-14 21:43:07,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:07,879 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-14 21:43:07,881 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:07,907 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:43:07,907 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:07,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-10-14 21:43:07,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187735101] [2019-10-14 21:43:07,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 21:43:07,909 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:07,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 21:43:07,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:43:07,910 INFO L87 Difference]: Start difference. First operand 165 states and 198 transitions. Second operand 33 states. [2019-10-14 21:43:08,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:08,133 INFO L93 Difference]: Finished difference Result 270 states and 336 transitions. [2019-10-14 21:43:08,133 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 21:43:08,133 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 110 [2019-10-14 21:43:08,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:08,135 INFO L225 Difference]: With dead ends: 270 [2019-10-14 21:43:08,135 INFO L226 Difference]: Without dead ends: 168 [2019-10-14 21:43:08,136 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 21:43:08,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2019-10-14 21:43:08,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2019-10-14 21:43:08,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2019-10-14 21:43:08,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 200 transitions. [2019-10-14 21:43:08,145 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 200 transitions. Word has length 110 [2019-10-14 21:43:08,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:08,146 INFO L462 AbstractCegarLoop]: Abstraction has 167 states and 200 transitions. [2019-10-14 21:43:08,146 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 21:43:08,146 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 200 transitions. [2019-10-14 21:43:08,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-10-14 21:43:08,148 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:08,148 INFO L380 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:08,352 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:08,353 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:08,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:08,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1528957797, now seen corresponding path program 26 times [2019-10-14 21:43:08,353 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:08,354 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150731801] [2019-10-14 21:43:08,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:08,354 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:08,354 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:08,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:09,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:09,058 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 2 proven. 841 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-14 21:43:09,059 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150731801] [2019-10-14 21:43:09,060 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607137690] [2019-10-14 21:43:09,060 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 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 [2019-10-14 21:43:09,178 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:43:09,178 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:09,180 INFO L256 TraceCheckSpWp]: Trace formula consists of 352 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:43:09,183 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:09,225 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-14 21:43:09,225 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:09,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-10-14 21:43:09,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745353017] [2019-10-14 21:43:09,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 21:43:09,226 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:09,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 21:43:09,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:43:09,227 INFO L87 Difference]: Start difference. First operand 167 states and 200 transitions. Second operand 34 states. [2019-10-14 21:43:09,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:09,432 INFO L93 Difference]: Finished difference Result 272 states and 338 transitions. [2019-10-14 21:43:09,433 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 21:43:09,433 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 112 [2019-10-14 21:43:09,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:09,435 INFO L225 Difference]: With dead ends: 272 [2019-10-14 21:43:09,435 INFO L226 Difference]: Without dead ends: 170 [2019-10-14 21:43:09,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 21:43:09,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-14 21:43:09,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2019-10-14 21:43:09,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-10-14 21:43:09,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 202 transitions. [2019-10-14 21:43:09,442 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 202 transitions. Word has length 112 [2019-10-14 21:43:09,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:09,442 INFO L462 AbstractCegarLoop]: Abstraction has 169 states and 202 transitions. [2019-10-14 21:43:09,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 21:43:09,442 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 202 transitions. [2019-10-14 21:43:09,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2019-10-14 21:43:09,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:09,443 INFO L380 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:09,644 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:09,644 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:09,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:09,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1279979193, now seen corresponding path program 27 times [2019-10-14 21:43:09,645 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:09,645 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540018434] [2019-10-14 21:43:09,645 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:09,646 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:09,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 2 proven. 900 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-14 21:43:10,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540018434] [2019-10-14 21:43:10,355 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232563044] [2019-10-14 21:43:10,355 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:10,511 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-14 21:43:10,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:10,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:43:10,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:10,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1021 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2019-10-14 21:43:10,739 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:10,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 13] total 45 [2019-10-14 21:43:10,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508849933] [2019-10-14 21:43:10,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-10-14 21:43:10,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:10,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-10-14 21:43:10,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1383, Unknown=0, NotChecked=0, Total=1980 [2019-10-14 21:43:10,741 INFO L87 Difference]: Start difference. First operand 169 states and 202 transitions. Second operand 45 states. [2019-10-14 21:43:12,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:12,317 INFO L93 Difference]: Finished difference Result 289 states and 363 transitions. [2019-10-14 21:43:12,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-14 21:43:12,317 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 114 [2019-10-14 21:43:12,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:12,319 INFO L225 Difference]: With dead ends: 289 [2019-10-14 21:43:12,319 INFO L226 Difference]: Without dead ends: 187 [2019-10-14 21:43:12,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1781, Invalid=5529, Unknown=0, NotChecked=0, Total=7310 [2019-10-14 21:43:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-10-14 21:43:12,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 177. [2019-10-14 21:43:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-14 21:43:12,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 212 transitions. [2019-10-14 21:43:12,329 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 212 transitions. Word has length 114 [2019-10-14 21:43:12,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:12,330 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 212 transitions. [2019-10-14 21:43:12,330 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-10-14 21:43:12,330 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 212 transitions. [2019-10-14 21:43:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-10-14 21:43:12,331 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:12,331 INFO L380 BasicCegarLoop]: trace histogram [31, 31, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:12,535 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:12,536 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1948811390, now seen corresponding path program 28 times [2019-10-14 21:43:12,537 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:12,537 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213074438] [2019-10-14 21:43:12,537 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,538 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:12,538 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:13,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 2 proven. 961 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:43:13,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213074438] [2019-10-14 21:43:13,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419306174] [2019-10-14 21:43:13,038 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:13,156 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:43:13,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:13,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-14 21:43:13,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1110 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-14 21:43:13,179 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:13,179 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-10-14 21:43:13,179 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391970652] [2019-10-14 21:43:13,179 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:43:13,180 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:13,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:43:13,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:43:13,181 INFO L87 Difference]: Start difference. First operand 177 states and 212 transitions. Second operand 36 states. [2019-10-14 21:43:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:13,402 INFO L93 Difference]: Finished difference Result 288 states and 358 transitions. [2019-10-14 21:43:13,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:43:13,403 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 119 [2019-10-14 21:43:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:13,405 INFO L225 Difference]: With dead ends: 288 [2019-10-14 21:43:13,405 INFO L226 Difference]: Without dead ends: 180 [2019-10-14 21:43:13,406 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:43:13,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-10-14 21:43:13,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2019-10-14 21:43:13,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-10-14 21:43:13,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 214 transitions. [2019-10-14 21:43:13,414 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 214 transitions. Word has length 119 [2019-10-14 21:43:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:13,414 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 214 transitions. [2019-10-14 21:43:13,414 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:43:13,415 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 214 transitions. [2019-10-14 21:43:13,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:43:13,415 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:13,416 INFO L380 BasicCegarLoop]: trace histogram [32, 32, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:13,619 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:13,620 INFO L410 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:13,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:13,620 INFO L82 PathProgramCache]: Analyzing trace with hash 311326560, now seen corresponding path program 29 times [2019-10-14 21:43:13,621 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:13,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678156861] [2019-10-14 21:43:13,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,621 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:13,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:14,199 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 2 proven. 1024 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:43:14,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678156861] [2019-10-14 21:43:14,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228993380] [2019-10-14 21:43:14,199 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,337 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2019-10-14 21:43:15,338 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:15,342 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 34 conjunts are in the unsatisfiable core [2019-10-14 21:43:15,344 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1173 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-14 21:43:15,369 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:15,370 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-10-14 21:43:15,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490242463] [2019-10-14 21:43:15,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 21:43:15,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:15,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 21:43:15,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:43:15,371 INFO L87 Difference]: Start difference. First operand 179 states and 214 transitions. Second operand 37 states. [2019-10-14 21:43:15,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:43:15,646 INFO L93 Difference]: Finished difference Result 290 states and 360 transitions. [2019-10-14 21:43:15,646 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 21:43:15,646 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 121 [2019-10-14 21:43:15,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:43:15,648 INFO L225 Difference]: With dead ends: 290 [2019-10-14 21:43:15,648 INFO L226 Difference]: Without dead ends: 182 [2019-10-14 21:43:15,649 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 21:43:15,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2019-10-14 21:43:15,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2019-10-14 21:43:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-10-14 21:43:15,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 216 transitions. [2019-10-14 21:43:15,657 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 216 transitions. Word has length 121 [2019-10-14 21:43:15,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:43:15,657 INFO L462 AbstractCegarLoop]: Abstraction has 181 states and 216 transitions. [2019-10-14 21:43:15,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 21:43:15,658 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 216 transitions. [2019-10-14 21:43:15,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2019-10-14 21:43:15,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:43:15,659 INFO L380 BasicCegarLoop]: trace histogram [33, 33, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:43:15,865 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:15,866 INFO L410 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:43:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:43:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash -949555266, now seen corresponding path program 30 times [2019-10-14 21:43:15,867 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:43:15,867 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307061061] [2019-10-14 21:43:15,867 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,868 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:43:15,868 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:43:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:43:16,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 2 proven. 1089 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:43:16,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307061061] [2019-10-14 21:43:16,598 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923670417] [2019-10-14 21:43:16,599 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:43:18,697 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-10-14 21:43:18,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:43:18,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:43:18,703 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:43:19,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1238 backedges. 65 proven. 145 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2019-10-14 21:43:19,029 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:43:19,029 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 16] total 51 [2019-10-14 21:43:19,029 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323156114] [2019-10-14 21:43:19,029 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-10-14 21:43:19,030 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:43:19,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-10-14 21:43:19,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=1766, Unknown=0, NotChecked=0, Total=2550 [2019-10-14 21:43:19,031 INFO L87 Difference]: Start difference. First operand 181 states and 216 transitions. Second operand 51 states.