/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/bor1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:35:32,738 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:35:32,740 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:35:32,752 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:35:32,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:35:32,754 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:35:32,755 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:35:32,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:35:32,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:35:32,760 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:35:32,761 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:35:32,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:35:32,762 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:35:32,764 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:35:32,768 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:35:32,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:35:32,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:35:32,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:35:32,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:35:32,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:35:32,782 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:35:32,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:35:32,787 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:35:32,788 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:35:32,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-06 18:35:32,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-06 18:35:32,794 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-06 18:35:32,798 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-06 18:35:32,798 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-06 18:35:32,799 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-06 18:35:32,799 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-06 18:35:32,803 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-06 18:35:32,804 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-06 18:35:32,805 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-06 18:35:32,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-06 18:35:32,811 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-06 18:35:32,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-06 18:35:32,812 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-06 18:35:32,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:35:32,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:35:32,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:35:32,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:35:32,849 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:35:32,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:35:32,856 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:35:32,856 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:35:32,856 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:35:32,857 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:35:32,857 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:35:32,857 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:35:32,857 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:35:32,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:35:32,858 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:35:32,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:35:32,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:35:32,862 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:35:32,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:35:32,864 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:35:32,864 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:35:32,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:35:32,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:35:32,865 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:35:32,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:35:32,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:35:32,865 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:35:32,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:35:32,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:35:32,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:35:32,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:35:32,866 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:35:32,867 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:35:33,201 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:35:33,214 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:35:33,218 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:35:33,219 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:35:33,219 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:35:33,220 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor1.i [2019-11-06 18:35:33,290 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46da1fdb3/532f91c9ae7d42ef85782a86dede9179/FLAG20bb1a7fc [2019-11-06 18:35:33,749 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:35:33,749 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor1.i [2019-11-06 18:35:33,754 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46da1fdb3/532f91c9ae7d42ef85782a86dede9179/FLAG20bb1a7fc [2019-11-06 18:35:34,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/46da1fdb3/532f91c9ae7d42ef85782a86dede9179 [2019-11-06 18:35:34,192 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:35:34,194 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:35:34,195 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:34,195 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:35:34,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:35:34,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c92f80f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,210 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:35:34,232 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:35:34,428 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:34,442 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:35:34,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:34,549 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:35:34,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34 WrapperNode [2019-11-06 18:35:34,551 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:34,551 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:35:34,551 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:35:34,552 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:35:34,566 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,566 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... [2019-11-06 18:35:34,599 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:35:34,599 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:35:34,599 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:35:34,599 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:35:34,600 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:35:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:35:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:35:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2019-11-06 18:35:34,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:35:34,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:35:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:35:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2019-11-06 18:35:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:35:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:35:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:35:34,653 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:35:34,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:35:34,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:35:34,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:35:34,942 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:35:34,942 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:35:34,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34 BoogieIcfgContainer [2019-11-06 18:35:34,952 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:35:34,954 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:35:34,954 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:35:34,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:35:34,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:35:34" (1/3) ... [2019-11-06 18:35:34,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecfb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:34" (2/3) ... [2019-11-06 18:35:34,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecfb04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:34, skipping insertion in model container [2019-11-06 18:35:34,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:34" (3/3) ... [2019-11-06 18:35:34,972 INFO L109 eAbstractionObserver]: Analyzing ICFG bor1.i [2019-11-06 18:35:34,989 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:35:34,997 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:35:35,009 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:35:35,037 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:35:35,038 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:35:35,038 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:35:35,038 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:35:35,038 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:35:35,038 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:35:35,038 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:35:35,039 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:35:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:35:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:35,060 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,061 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:35,063 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-11-06 18:35:35,075 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,075 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475864143] [2019-11-06 18:35:35,075 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:35,321 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475864143] [2019-11-06 18:35:35,323 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:35:35,323 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:35:35,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482932945] [2019-11-06 18:35:35,331 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,332 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:35,349 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:35:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,464 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:35:35,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,466 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:35,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,480 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:35:35,480 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:35:35,484 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:35,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:35:35,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:35:35,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:35:35,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:35:35,534 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:35:35,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,534 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:35:35,534 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:35:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:35,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,537 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:35,538 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:35,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:35,539 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-11-06 18:35:35,539 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:35,540 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974071923] [2019-11-06 18:35:35,540 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,722 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:35:35,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974071923] [2019-11-06 18:35:35,723 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991108430] [2019-11-06 18:35:35,723 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 [2019-11-06 18:35:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:35,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:35,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:35,878 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:35,878 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:35:35,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198269265] [2019-11-06 18:35:35,881 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:35,882 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:35,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:35,883 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:35:35,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:35,901 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:35:35,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:35,902 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:35,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:35,903 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:35,903 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:35:35,904 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:35:35,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:35:35,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:35:35,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:35:35,912 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:35:35,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:35,912 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:35:35,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:35,912 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:35:35,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:35:35,914 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:35,914 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:36,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,117 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:36,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:36,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-11-06 18:35:36,118 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:36,119 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19783019] [2019-11-06 18:35:36,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:35:36,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19783019] [2019-11-06 18:35:36,206 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495076704] [2019-11-06 18:35:36,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,289 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:35:36,307 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:36,307 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:35:36,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246480407] [2019-11-06 18:35:36,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:36,308 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:36,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:36,309 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:35:36,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,335 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:35:36,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:36,335 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:35:36,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,336 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:36,337 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:35:36,337 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:36,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:35:36,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:35:36,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:35:36,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:35:36,349 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:35:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,350 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:35:36,350 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:35:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:35:36,354 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,354 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:36,555 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,555 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:36,556 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-11-06 18:35:36,557 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:36,557 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915602527] [2019-11-06 18:35:36,558 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:36,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:36,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915602527] [2019-11-06 18:35:36,686 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492035880] [2019-11-06 18:35:36,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:36,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:36,747 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:36,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:35:36,764 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:36,764 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:35:36,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032866115] [2019-11-06 18:35:36,765 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:36,765 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:36,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:36,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:36,766 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:35:36,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:36,783 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:35:36,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:36,787 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:35:36,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:36,788 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:35:36,789 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:35:36,789 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:36,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:35:36,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:35:36,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:35:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:35:36,801 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:35:36,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:36,806 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:35:36,806 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:36,806 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:35:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:35:36,807 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:36,808 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:37,008 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,009 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:37,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-11-06 18:35:37,010 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:37,011 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930475078] [2019-11-06 18:35:37,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,123 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:37,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930475078] [2019-11-06 18:35:37,124 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714565915] [2019-11-06 18:35:37,124 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,186 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,188 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,208 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:35:37,208 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,208 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:35:37,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998728610] [2019-11-06 18:35:37,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:35:37,209 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:35:37,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:35:37,213 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:35:37,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,368 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:35:37,368 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:35:37,368 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:35:37,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,369 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:35:37,370 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:35:37,370 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:35:37,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:35:37,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:35:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:35:37,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:35:37,377 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:35:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,377 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:35:37,378 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:35:37,378 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:35:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:35:37,379 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,379 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:37,579 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,580 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:37,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:37,580 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-11-06 18:35:37,580 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:37,580 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546610409] [2019-11-06 18:35:37,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:37,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546610409] [2019-11-06 18:35:37,656 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706578062] [2019-11-06 18:35:37,656 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:37,725 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:37,725 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:37,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:37,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:37,749 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:37,749 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:35:37,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403285526] [2019-11-06 18:35:37,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:35:37,750 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:37,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:35:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:37,751 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:35:37,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:37,835 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:35:37,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:35:37,836 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:35:37,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:37,837 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:35:37,837 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:35:37,838 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:37,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:35:37,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:35:37,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:35:37,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:35:37,844 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:35:37,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:37,845 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:35:37,845 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:35:37,845 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:35:37,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:35:37,846 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:37,846 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:38,057 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,058 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-11-06 18:35:38,059 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,060 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917319280] [2019-11-06 18:35:38,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,167 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:38,168 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917319280] [2019-11-06 18:35:38,168 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945907716] [2019-11-06 18:35:38,168 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,217 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:35:38,217 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,219 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,221 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:35:38,249 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:38,249 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:35:38,249 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860892596] [2019-11-06 18:35:38,250 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:38,250 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,251 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:35:38,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:38,362 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:35:38,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:35:38,363 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:35:38,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:38,364 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:35:38,364 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:35:38,365 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:35:38,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:35:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:35:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:35:38,371 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:35:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:38,372 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:35:38,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:38,372 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:35:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:35:38,373 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:38,373 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:38,574 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,574 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:38,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:38,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-11-06 18:35:38,575 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:38,575 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901109024] [2019-11-06 18:35:38,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,664 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901109024] [2019-11-06 18:35:38,664 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147585374] [2019-11-06 18:35:38,664 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:38,719 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:38,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:38,720 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:38,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:38,745 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:38,746 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:38,746 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:35:38,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828050306] [2019-11-06 18:35:38,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:38,747 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:38,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:38,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,749 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:35:38,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:38,854 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:35:38,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:35:38,855 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:35:38,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:38,856 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:35:38,856 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:35:38,857 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:38,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:35:38,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:35:38,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:35:38,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:35:38,869 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:35:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:38,870 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:35:38,870 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:38,870 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:35:38,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:35:38,872 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:38,872 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:39,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,073 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:39,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:39,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-11-06 18:35:39,074 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:39,074 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399273507] [2019-11-06 18:35:39,074 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:39,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,191 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:39,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399273507] [2019-11-06 18:35:39,192 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296858466] [2019-11-06 18:35:39,192 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,284 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:35:39,284 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:39,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:39,287 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:35:39,331 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:39,331 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:35:39,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363032510] [2019-11-06 18:35:39,332 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:39,332 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:39,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:39,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:39,333 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:35:39,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:39,493 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:35:39,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:39,493 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:35:39,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:39,494 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:35:39,494 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:35:39,495 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:35:39,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:35:39,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:35:39,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:35:39,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:35:39,501 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:35:39,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:39,501 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:35:39,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:39,502 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:35:39,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:35:39,503 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:39,503 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:39,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,711 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:39,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:39,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-11-06 18:35:39,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:39,712 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701579561] [2019-11-06 18:35:39,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:39,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:35:39,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701579561] [2019-11-06 18:35:39,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033266504] [2019-11-06 18:35:39,808 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:39,886 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:35:39,886 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:39,887 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:39,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:35:39,955 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:39,955 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:35:39,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873844575] [2019-11-06 18:35:39,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:35:39,956 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:39,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:35:39,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:35:39,956 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:35:40,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,158 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:35:40,159 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:35:40,159 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:35:40,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,160 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:35:40,160 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:35:40,161 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:35:40,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:35:40,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:35:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:35:40,169 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:35:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,170 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:35:40,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:35:40,171 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:35:40,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:35:40,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,174 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:40,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,380 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,380 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-11-06 18:35:40,380 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,381 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916688587] [2019-11-06 18:35:40,381 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916688587] [2019-11-06 18:35:40,498 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262493211] [2019-11-06 18:35:40,498 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,557 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:40,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,575 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:40,575 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:35:40,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333208002] [2019-11-06 18:35:40,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:40,576 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:40,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:40,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:40,577 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:35:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:40,667 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:35:40,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:35:40,667 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:35:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:40,668 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:35:40,669 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:35:40,670 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:40,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:35:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:35:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:35:40,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:35:40,679 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:35:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:40,679 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:35:40,679 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:35:40,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:35:40,680 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:40,681 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:40,884 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:40,884 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:40,885 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-11-06 18:35:40,886 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:40,886 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115802078] [2019-11-06 18:35:40,886 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:40,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:40,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115802078] [2019-11-06 18:35:40,999 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032923130] [2019-11-06 18:35:40,999 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,077 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:41,077 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:41,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:35:41,080 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:41,099 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:41,099 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:35:41,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133804911] [2019-11-06 18:35:41,100 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:35:41,101 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:41,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:35:41,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:41,102 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:35:41,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:41,212 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:35:41,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:41,212 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:35:41,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:41,213 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:35:41,213 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:35:41,213 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:41,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:35:41,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:35:41,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:35:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:35:41,219 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:35:41,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:41,219 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:35:41,220 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:35:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:35:41,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:35:41,220 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:41,221 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:41,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,424 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:41,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:41,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-11-06 18:35:41,425 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:41,425 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572175199] [2019-11-06 18:35:41,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:41,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:41,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572175199] [2019-11-06 18:35:41,573 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492249988] [2019-11-06 18:35:41,574 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:41,626 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:35:41,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:41,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:41,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:35:41,672 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:41,672 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:35:41,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270473455] [2019-11-06 18:35:41,675 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:35:41,675 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:41,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:35:41,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:41,676 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:35:41,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:41,836 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:35:41,836 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:35:41,837 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:35:41,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:41,838 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:35:41,838 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:35:41,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:41,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:35:41,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:35:41,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:35:41,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:35:41,849 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:35:41,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:41,849 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:35:41,849 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:35:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:35:41,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:35:41,850 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:41,851 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:42,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,055 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:42,055 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-11-06 18:35:42,055 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:42,056 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410503807] [2019-11-06 18:35:42,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:42,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:35:42,245 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410503807] [2019-11-06 18:35:42,246 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486826954] [2019-11-06 18:35:42,246 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,320 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:42,320 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:42,322 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:42,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:35:42,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:42,431 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:35:42,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494002414] [2019-11-06 18:35:42,432 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:42,432 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:42,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:42,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:42,433 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:35:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:42,690 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:35:42,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:35:42,691 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:35:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:42,692 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:35:42,692 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:35:42,694 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:42,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:35:42,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:35:42,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:35:42,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:35:42,701 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:35:42,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:42,702 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:35:42,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:42,702 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:35:42,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:35:42,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:42,703 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:42,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,904 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:42,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:42,904 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-11-06 18:35:42,905 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:42,905 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268888610] [2019-11-06 18:35:42,905 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,054 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:35:43,054 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268888610] [2019-11-06 18:35:43,055 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718331247] [2019-11-06 18:35:43,055 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:43,332 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:35:43,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:43,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:43,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,438 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:35:43,438 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:43,439 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:35:43,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132579851] [2019-11-06 18:35:43,440 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:43,440 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:43,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:43,441 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:35:43,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:43,704 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:35:43,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:35:43,705 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:35:43,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:43,706 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:35:43,706 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:35:43,707 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:35:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:35:43,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:35:43,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:35:43,712 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:35:43,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:43,713 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:35:43,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:43,713 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:35:43,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:35:43,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:43,714 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:43,915 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:43,915 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:43,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:43,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-11-06 18:35:43,916 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:43,916 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305937082] [2019-11-06 18:35:43,917 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,081 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:35:44,082 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305937082] [2019-11-06 18:35:44,082 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001423418] [2019-11-06 18:35:44,082 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,201 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:35:44,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:44,203 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,271 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:35:44,271 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,271 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:35:44,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583970500] [2019-11-06 18:35:44,272 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:35:44,272 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:35:44,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:44,273 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:35:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,449 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:35:44,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:44,449 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:35:44,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,450 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:35:44,450 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:35:44,453 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:44,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:35:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:35:44,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:35:44,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:35:44,463 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:35:44,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,464 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:35:44,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:35:44,464 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:35:44,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:35:44,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,467 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:44,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,670 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-11-06 18:35:44,671 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,671 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467925496] [2019-11-06 18:35:44,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467925496] [2019-11-06 18:35:44,872 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353441936] [2019-11-06 18:35:44,872 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,946 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,947 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,968 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:44,969 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,969 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:35:44,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590208884] [2019-11-06 18:35:44,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:35:44,970 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:35:44,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:44,971 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:35:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:45,079 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:35:45,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:35:45,080 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:35:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:45,081 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:35:45,081 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:35:45,081 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:35:45,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:35:45,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:35:45,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:35:45,091 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:35:45,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:45,091 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:35:45,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:35:45,092 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:35:45,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:35:45,092 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:45,097 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:45,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,300 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,301 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-11-06 18:35:45,301 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,301 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256135456] [2019-11-06 18:35:45,301 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,522 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256135456] [2019-11-06 18:35:45,523 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611146946] [2019-11-06 18:35:45,523 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,603 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:45,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:45,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:35:45,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:45,636 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:45,637 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:45,637 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:35:45,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242095894] [2019-11-06 18:35:45,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:45,638 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:45,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:45,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,639 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:35:45,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:45,746 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:35:45,746 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:35:45,747 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:35:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:45,747 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:35:45,748 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:35:45,748 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:35:45,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:35:45,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:35:45,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:35:45,757 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:35:45,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:45,757 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:35:45,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:45,758 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:35:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:35:45,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:45,759 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:45,963 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,964 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,964 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-11-06 18:35:45,964 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,964 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222981553] [2019-11-06 18:35:45,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:46,176 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222981553] [2019-11-06 18:35:46,177 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860127570] [2019-11-06 18:35:46,177 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:46,252 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:35:46,253 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:46,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:46,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:46,375 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:35:46,376 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:46,376 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:35:46,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987856131] [2019-11-06 18:35:46,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:46,378 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:46,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:46,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:46,379 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:35:46,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:46,574 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:35:46,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:46,574 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:35:46,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:46,575 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:35:46,575 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:35:46,576 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:46,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:35:46,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:35:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:35:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:35:46,580 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:35:46,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:46,581 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:35:46,581 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:35:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:35:46,582 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:46,582 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:46,786 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:46,786 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-11-06 18:35:46,787 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:46,787 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821851639] [2019-11-06 18:35:46,787 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:47,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821851639] [2019-11-06 18:35:47,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979038410] [2019-11-06 18:35:47,005 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,090 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:47,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:47,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:35:47,096 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:47,141 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:47,141 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:47,142 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:35:47,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571313350] [2019-11-06 18:35:47,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:47,143 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:47,144 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:35:47,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:47,376 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:35:47,377 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:47,378 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:35:47,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:47,379 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:35:47,379 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:35:47,380 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:47,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:35:47,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:35:47,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:35:47,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:35:47,387 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:35:47,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:47,388 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:35:47,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:47,389 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:35:47,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:35:47,391 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:47,391 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:47,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,596 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:47,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:47,597 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-11-06 18:35:47,597 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:47,598 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782450870] [2019-11-06 18:35:47,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,893 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:47,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782450870] [2019-11-06 18:35:47,893 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490130682] [2019-11-06 18:35:47,894 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:48,626 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:35:48,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:48,630 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:48,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:48,739 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:35:48,739 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:48,740 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:35:48,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661908573] [2019-11-06 18:35:48,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:48,740 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:48,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:48,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:48,741 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:35:49,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:49,105 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:35:49,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:49,106 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:35:49,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:49,107 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:35:49,107 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:35:49,108 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:35:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:35:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:35:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:35:49,113 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:35:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:49,113 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:35:49,114 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:35:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:35:49,115 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:49,115 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:49,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:49,320 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:49,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:49,320 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-11-06 18:35:49,321 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:49,321 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689991457] [2019-11-06 18:35:49,321 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:35:49,613 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689991457] [2019-11-06 18:35:49,613 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60847666] [2019-11-06 18:35:49,613 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:50,104 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:35:50,104 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:50,109 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:50,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 18:35:50,214 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:50,215 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 18:35:50,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022014800] [2019-11-06 18:35:50,215 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:50,216 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:50,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:50,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:50,216 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 18:35:50,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:50,469 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 18:35:50,470 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:50,470 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 18:35:50,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:50,471 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:35:50,471 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:35:50,472 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:35:50,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:35:50,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:35:50,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 18:35:50,477 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 18:35:50,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:50,478 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 18:35:50,478 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:50,478 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 18:35:50,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:35:50,479 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:50,479 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:50,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:50,684 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:50,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:50,684 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-11-06 18:35:50,684 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:50,684 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685842645] [2019-11-06 18:35:50,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,026 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685842645] [2019-11-06 18:35:51,027 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601928873] [2019-11-06 18:35:51,027 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,140 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:35:51,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:51,195 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:51,196 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:51,196 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:35:51,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292856435] [2019-11-06 18:35:51,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:51,204 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:51,205 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 18:35:51,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:51,417 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 18:35:51,417 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:35:51,417 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 18:35:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:51,419 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:35:51,419 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:35:51,420 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:35:51,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:35:51,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:35:51,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:35:51,428 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 18:35:51,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:51,429 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:35:51,429 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:35:51,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:35:51,430 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:51,430 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:51,634 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,634 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:51,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:51,634 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-11-06 18:35:51,635 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:51,635 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226686582] [2019-11-06 18:35:51,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:51,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,102 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:52,102 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226686582] [2019-11-06 18:35:52,103 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113937814] [2019-11-06 18:35:52,103 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:52,187 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:52,187 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:52,188 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:35:52,205 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:52,233 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:52,233 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:35:52,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789132994] [2019-11-06 18:35:52,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:35:52,234 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:52,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:35:52,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:52,235 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:35:52,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:52,452 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:35:52,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:52,452 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:35:52,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:52,453 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:35:52,454 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:35:52,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:52,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:35:52,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:35:52,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:35:52,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:35:52,470 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:35:52,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:52,470 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:35:52,470 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:35:52,471 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:35:52,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:35:52,476 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:52,476 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:52,681 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:52,681 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:52,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:52,681 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-11-06 18:35:52,681 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:52,682 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377104489] [2019-11-06 18:35:52,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:53,012 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377104489] [2019-11-06 18:35:53,013 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655667078] [2019-11-06 18:35:53,013 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:53,195 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:35:53,196 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:53,198 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:53,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:53,389 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 18:35:53,389 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:53,389 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 18:35:53,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820639712] [2019-11-06 18:35:53,390 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:35:53,390 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:53,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:35:53,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:35:53,391 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 18:35:53,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:53,706 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 18:35:53,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:35:53,707 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 18:35:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:53,708 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:35:53,708 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:35:53,708 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:35:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:35:53,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:35:53,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:35:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 18:35:53,717 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 18:35:53,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:53,718 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 18:35:53,718 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:35:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 18:35:53,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 18:35:53,719 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:53,719 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:53,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:53,924 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:53,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:53,924 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-11-06 18:35:53,924 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:53,925 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487984194] [2019-11-06 18:35:53,925 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:54,300 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487984194] [2019-11-06 18:35:54,301 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244153206] [2019-11-06 18:35:54,301 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:54,401 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:54,402 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:54,403 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:35:54,406 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:54,445 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:54,445 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:35:54,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759834902] [2019-11-06 18:35:54,446 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:35:54,446 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:54,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:35:54,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:54,447 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 18:35:54,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:54,634 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 18:35:54,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:35:54,634 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 18:35:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:54,635 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:35:54,635 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:35:54,636 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:35:54,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:35:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:35:54,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:35:54,640 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 18:35:54,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:54,641 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:35:54,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:35:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:35:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:35:54,642 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:54,642 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:54,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:54,846 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:54,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:54,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-11-06 18:35:54,847 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:54,847 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347063445] [2019-11-06 18:35:54,847 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:55,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:35:55,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347063445] [2019-11-06 18:35:55,210 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952021039] [2019-11-06 18:35:55,211 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:59,107 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 18:35:59,108 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:59,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:59,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:59,282 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 18:35:59,282 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:59,282 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 18:35:59,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052825861] [2019-11-06 18:35:59,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:35:59,283 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:59,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:35:59,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:59,284 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 18:35:59,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:59,890 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 18:35:59,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:35:59,890 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 18:35:59,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:59,891 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:35:59,892 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:35:59,893 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:35:59,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:35:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 18:35:59,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 18:35:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 18:35:59,898 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 18:35:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:59,899 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 18:35:59,899 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:35:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 18:35:59,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 18:35:59,903 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:59,903 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:00,110 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:00,111 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:00,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:00,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-11-06 18:36:00,112 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:00,112 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399737356] [2019-11-06 18:36:00,112 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:36:00,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399737356] [2019-11-06 18:36:00,503 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318587678] [2019-11-06 18:36:00,503 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:01,507 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:36:01,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:01,509 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:01,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 18:36:01,647 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:01,647 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:36:01,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822645945] [2019-11-06 18:36:01,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:36:01,648 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:01,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:36:01,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:01,649 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 18:36:01,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:01,911 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 18:36:01,911 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:36:01,911 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 18:36:01,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:01,913 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:36:01,913 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:36:01,914 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:01,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:36:01,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 18:36:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:36:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 18:36:01,919 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 18:36:01,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:01,920 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 18:36:01,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:36:01,920 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 18:36:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:36:01,921 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:01,921 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:02,125 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:02,126 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:02,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:02,126 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-11-06 18:36:02,126 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:02,126 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484994477] [2019-11-06 18:36:02,127 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:02,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:02,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484994477] [2019-11-06 18:36:02,597 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283420249] [2019-11-06 18:36:02,597 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:02,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:36:02,710 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:02,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:02,745 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:02,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:36:02,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674726675] [2019-11-06 18:36:02,745 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:36:02,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:02,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:36:02,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:02,747 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 18:36:02,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:02,982 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 18:36:02,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:36:02,984 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 18:36:02,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:02,985 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:36:02,985 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:36:02,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:36:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:36:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:36:02,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:36:02,991 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 18:36:02,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:02,992 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:36:02,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:36:02,992 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:36:02,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 18:36:02,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:02,993 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:03,193 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:03,194 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:03,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:03,194 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-11-06 18:36:03,195 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:03,195 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893530510] [2019-11-06 18:36:03,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:03,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893530510] [2019-11-06 18:36:03,649 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127603670] [2019-11-06 18:36:03,649 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:03,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:03,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:03,751 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:36:03,753 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:03,792 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:03,792 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:03,792 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:36:03,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579443427] [2019-11-06 18:36:03,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:36:03,794 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:03,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:36:03,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:03,795 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:36:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:03,943 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:36:03,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:36:03,944 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 18:36:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:03,945 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:36:03,945 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:36:03,947 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:03,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:36:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:36:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:36:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:36:03,952 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 18:36:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:03,952 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:36:03,952 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:36:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:36:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 18:36:03,953 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:03,953 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:04,157 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:04,157 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-11-06 18:36:04,158 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:04,159 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571836184] [2019-11-06 18:36:04,159 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:04,728 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571836184] [2019-11-06 18:36:04,729 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603402555] [2019-11-06 18:36:04,729 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:04,960 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:36:04,960 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:04,962 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:04,964 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 18:36:05,153 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:05,153 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 18:36:05,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703449524] [2019-11-06 18:36:05,154 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:36:05,154 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:05,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:36:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:05,155 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 18:36:05,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:05,682 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 18:36:05,683 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:36:05,683 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 18:36:05,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:05,684 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:36:05,684 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:36:05,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 18:36:05,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:36:05,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 18:36:05,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 18:36:05,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 18:36:05,691 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 18:36:05,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:05,692 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 18:36:05,692 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:36:05,692 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 18:36:05,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:36:05,693 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:05,693 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:05,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:05,898 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:05,898 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-11-06 18:36:05,899 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:05,899 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836240165] [2019-11-06 18:36:05,899 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:05,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:06,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:36:06,326 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836240165] [2019-11-06 18:36:06,327 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348300249] [2019-11-06 18:36:06,327 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:06,465 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:06,466 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:06,467 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:36:06,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:06,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 18:36:06,631 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:06,631 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 18:36:06,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356737295] [2019-11-06 18:36:06,631 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:36:06,631 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:06,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:36:06,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:36:06,632 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-11-06 18:36:07,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:07,122 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-11-06 18:36:07,122 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:36:07,123 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-11-06 18:36:07,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:07,124 INFO L225 Difference]: With dead ends: 169 [2019-11-06 18:36:07,124 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 18:36:07,126 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 18:36:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 18:36:07,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-11-06 18:36:07,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:36:07,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-11-06 18:36:07,131 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-11-06 18:36:07,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:07,131 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-11-06 18:36:07,131 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:36:07,131 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-11-06 18:36:07,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:36:07,132 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:07,133 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:07,336 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:07,336 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:07,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:07,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-11-06 18:36:07,337 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:07,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417746491] [2019-11-06 18:36:07,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:07,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:36:07,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417746491] [2019-11-06 18:36:07,801 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220320794] [2019-11-06 18:36:07,801 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:15,810 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-11-06 18:36:15,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:15,818 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:36:15,820 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 444 proven. 100 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2019-11-06 18:36:16,026 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:16,027 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 44 [2019-11-06 18:36:16,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487390096] [2019-11-06 18:36:16,028 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-06 18:36:16,028 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-06 18:36:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1317, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 18:36:16,029 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 44 states.