java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 17:43:35,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:43:35,850 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:43:35,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:43:35,865 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:43:35,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:43:35,869 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:43:35,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:43:35,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:43:35,882 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:43:35,883 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:43:35,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:43:35,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:43:35,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:43:35,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:43:35,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:43:35,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:43:35,896 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:43:35,898 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:43:35,903 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:43:35,904 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:43:35,905 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:43:35,908 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:43:35,909 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:43:35,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:43:35,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:43:35,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:43:35,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:43:35,919 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:43:35,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:43:35,923 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:43:35,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:43:35,924 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:43:35,924 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:43:35,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:43:35,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:43:35,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:43:35,949 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:43:35,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:43:35,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:43:35,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:43:35,952 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:43:35,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:43:35,953 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:43:35,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:43:35,953 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:43:35,953 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:43:35,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:43:35,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:43:35,955 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:43:35,955 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:43:35,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:43:35,956 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:43:35,956 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:43:35,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:43:35,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:43:35,956 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:43:35,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:43:35,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:43:35,957 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:43:35,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:43:35,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:43:35,958 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:43:35,958 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:43:35,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:43:35,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:43:36,258 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:43:36,272 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:43:36,275 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:43:36,277 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:43:36,277 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:43:36,278 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-10-13 17:43:36,353 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c02614ed/46347003e5804244ab148d1a8b2a0d28/FLAG32fbdd1ff [2019-10-13 17:43:36,841 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:43:36,842 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sorting_selectionsort_2_ground.i [2019-10-13 17:43:36,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c02614ed/46347003e5804244ab148d1a8b2a0d28/FLAG32fbdd1ff [2019-10-13 17:43:37,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c02614ed/46347003e5804244ab148d1a8b2a0d28 [2019-10-13 17:43:37,223 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:43:37,225 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:43:37,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:37,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:43:37,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:43:37,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,234 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4020d0db and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37, skipping insertion in model container [2019-10-13 17:43:37,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,242 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:43:37,264 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:43:37,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:37,486 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:43:37,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:43:37,636 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:43:37,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37 WrapperNode [2019-10-13 17:43:37,638 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:43:37,639 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:43:37,639 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:43:37,639 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:43:37,653 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,661 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,661 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,678 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,680 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... [2019-10-13 17:43:37,683 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:43:37,683 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:43:37,683 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:43:37,684 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:43:37,685 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:43:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:43:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:43:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:43:37,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:43:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:43:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:43:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:43:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:43:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:43:37,739 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:43:37,741 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:43:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:43:37,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:43:37,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:43:38,108 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:43:38,108 INFO L284 CfgBuilder]: Removed 8 assume(true) statements. [2019-10-13 17:43:38,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:38 BoogieIcfgContainer [2019-10-13 17:43:38,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:43:38,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:43:38,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:43:38,114 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:43:38,114 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:43:37" (1/3) ... [2019-10-13 17:43:38,115 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d39de1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:38, skipping insertion in model container [2019-10-13 17:43:38,115 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:43:37" (2/3) ... [2019-10-13 17:43:38,116 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d39de1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:43:38, skipping insertion in model container [2019-10-13 17:43:38,116 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:43:38" (3/3) ... [2019-10-13 17:43:38,117 INFO L109 eAbstractionObserver]: Analyzing ICFG sorting_selectionsort_2_ground.i [2019-10-13 17:43:38,127 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:43:38,135 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:43:38,147 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:43:38,173 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:43:38,173 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:43:38,173 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:43:38,173 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:43:38,173 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:43:38,173 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:43:38,174 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:43:38,174 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:43:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2019-10-13 17:43:38,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:38,197 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,198 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:38,200 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1156372912, now seen corresponding path program 1 times [2019-10-13 17:43:38,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471107817] [2019-10-13 17:43:38,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,213 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:38,387 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471107817] [2019-10-13 17:43:38,389 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:38,389 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:43:38,391 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375073857] [2019-10-13 17:43:38,395 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:43:38,396 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:43:38,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:43:38,409 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 3 states. [2019-10-13 17:43:38,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,585 INFO L93 Difference]: Finished difference Result 82 states and 123 transitions. [2019-10-13 17:43:38,585 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:43:38,586 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-13 17:43:38,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,597 INFO L225 Difference]: With dead ends: 82 [2019-10-13 17:43:38,597 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 17:43:38,601 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:43:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 17:43:38,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-13 17:43:38,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 17:43:38,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2019-10-13 17:43:38,646 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 16 [2019-10-13 17:43:38,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,646 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2019-10-13 17:43:38,647 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:43:38,647 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2019-10-13 17:43:38,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 17:43:38,648 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,648 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:38,649 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2078459264, now seen corresponding path program 1 times [2019-10-13 17:43:38,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419136366] [2019-10-13 17:43:38,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,650 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:43:38,719 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419136366] [2019-10-13 17:43:38,719 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:38,720 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:43:38,720 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530128730] [2019-10-13 17:43:38,722 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:38,722 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:38,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:38,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:38,723 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 4 states. [2019-10-13 17:43:38,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:38,938 INFO L93 Difference]: Finished difference Result 92 states and 123 transitions. [2019-10-13 17:43:38,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:38,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-13 17:43:38,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:38,941 INFO L225 Difference]: With dead ends: 92 [2019-10-13 17:43:38,941 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 17:43:38,943 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:43:38,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 17:43:38,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2019-10-13 17:43:38,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 17:43:38,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2019-10-13 17:43:38,972 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 16 [2019-10-13 17:43:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:38,974 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2019-10-13 17:43:38,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:38,975 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2019-10-13 17:43:38,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:43:38,977 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:38,977 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:38,977 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:38,980 INFO L82 PathProgramCache]: Analyzing trace with hash -898844059, now seen corresponding path program 1 times [2019-10-13 17:43:38,981 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:38,981 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081958481] [2019-10-13 17:43:38,981 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,981 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:38,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:39,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081958481] [2019-10-13 17:43:39,139 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:43:39,139 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 17:43:39,139 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173640698] [2019-10-13 17:43:39,140 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 17:43:39,141 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 17:43:39,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 17:43:39,145 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand 5 states. [2019-10-13 17:43:39,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:39,351 INFO L93 Difference]: Finished difference Result 94 states and 125 transitions. [2019-10-13 17:43:39,351 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:43:39,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-13 17:43:39,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:39,353 INFO L225 Difference]: With dead ends: 94 [2019-10-13 17:43:39,353 INFO L226 Difference]: Without dead ends: 63 [2019-10-13 17:43:39,354 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:43:39,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-10-13 17:43:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 43. [2019-10-13 17:43:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 17:43:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2019-10-13 17:43:39,363 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 20 [2019-10-13 17:43:39,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:39,364 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2019-10-13 17:43:39,364 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 17:43:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2019-10-13 17:43:39,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 17:43:39,365 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:39,365 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:39,365 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:39,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:39,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1561235658, now seen corresponding path program 1 times [2019-10-13 17:43:39,366 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:39,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266381770] [2019-10-13 17:43:39,367 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,367 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:39,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:39,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266381770] [2019-10-13 17:43:39,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579194267] [2019-10-13 17:43:39,464 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:39,539 INFO L256 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:39,547 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:39,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:39,593 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:39,593 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-10-13 17:43:39,594 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584024701] [2019-10-13 17:43:39,595 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:43:39,595 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:39,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:43:39,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:43:39,598 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand 7 states. [2019-10-13 17:43:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,100 INFO L93 Difference]: Finished difference Result 204 states and 283 transitions. [2019-10-13 17:43:40,100 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:43:40,100 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2019-10-13 17:43:40,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,104 INFO L225 Difference]: With dead ends: 204 [2019-10-13 17:43:40,105 INFO L226 Difference]: Without dead ends: 170 [2019-10-13 17:43:40,107 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:40,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2019-10-13 17:43:40,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 75. [2019-10-13 17:43:40,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-10-13 17:43:40,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 101 transitions. [2019-10-13 17:43:40,137 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 101 transitions. Word has length 23 [2019-10-13 17:43:40,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,137 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 101 transitions. [2019-10-13 17:43:40,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:43:40,137 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 101 transitions. [2019-10-13 17:43:40,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:43:40,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,139 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:40,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,346 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:40,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:40,346 INFO L82 PathProgramCache]: Analyzing trace with hash -968906542, now seen corresponding path program 1 times [2019-10-13 17:43:40,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:40,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857844869] [2019-10-13 17:43:40,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:40,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:40,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 17:43:40,419 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857844869] [2019-10-13 17:43:40,420 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670830083] [2019-10-13 17:43:40,420 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:40,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:40,485 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:43:40,489 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:40,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:43:40,533 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:40,534 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-13 17:43:40,534 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85719422] [2019-10-13 17:43:40,536 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:43:40,536 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:40,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:43:40,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:40,537 INFO L87 Difference]: Start difference. First operand 75 states and 101 transitions. Second operand 9 states. [2019-10-13 17:43:40,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:40,838 INFO L93 Difference]: Finished difference Result 198 states and 278 transitions. [2019-10-13 17:43:40,839 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:43:40,839 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2019-10-13 17:43:40,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:40,841 INFO L225 Difference]: With dead ends: 198 [2019-10-13 17:43:40,844 INFO L226 Difference]: Without dead ends: 134 [2019-10-13 17:43:40,845 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:43:40,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2019-10-13 17:43:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 104. [2019-10-13 17:43:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-13 17:43:40,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 141 transitions. [2019-10-13 17:43:40,876 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 141 transitions. Word has length 25 [2019-10-13 17:43:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:40,876 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 141 transitions. [2019-10-13 17:43:40,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:43:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 141 transitions. [2019-10-13 17:43:40,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:43:40,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:40,878 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,082 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,083 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1353497847, now seen corresponding path program 2 times [2019-10-13 17:43:41,084 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452672937] [2019-10-13 17:43:41,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,087 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,088 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:41,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452672937] [2019-10-13 17:43:41,216 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966576284] [2019-10-13 17:43:41,216 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,266 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-13 17:43:41,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:41,267 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,305 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 17:43:41,306 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-13 17:43:41,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2019-10-13 17:43:41,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233719401] [2019-10-13 17:43:41,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:43:41,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:43:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:41,308 INFO L87 Difference]: Start difference. First operand 104 states and 141 transitions. Second operand 4 states. [2019-10-13 17:43:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:41,379 INFO L93 Difference]: Finished difference Result 173 states and 238 transitions. [2019-10-13 17:43:41,379 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:43:41,380 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-10-13 17:43:41,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:41,381 INFO L225 Difference]: With dead ends: 173 [2019-10-13 17:43:41,381 INFO L226 Difference]: Without dead ends: 99 [2019-10-13 17:43:41,383 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:43:41,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-10-13 17:43:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2019-10-13 17:43:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-13 17:43:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2019-10-13 17:43:41,411 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 30 [2019-10-13 17:43:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:41,412 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2019-10-13 17:43:41,412 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:43:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2019-10-13 17:43:41,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 17:43:41,413 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:41,413 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:41,617 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,617 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:41,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:41,617 INFO L82 PathProgramCache]: Analyzing trace with hash -492354905, now seen corresponding path program 1 times [2019-10-13 17:43:41,618 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:41,618 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083211278] [2019-10-13 17:43:41,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,618 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:41,618 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,695 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-13 17:43:41,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083211278] [2019-10-13 17:43:41,696 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934556051] [2019-10-13 17:43:41,697 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:41,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:41,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 17:43:41,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:43:41,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:41,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-13 17:43:41,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138754172] [2019-10-13 17:43:41,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 17:43:41,794 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:41,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 17:43:41,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2019-10-13 17:43:41,795 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand 11 states. [2019-10-13 17:43:42,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,120 INFO L93 Difference]: Finished difference Result 255 states and 358 transitions. [2019-10-13 17:43:42,121 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 17:43:42,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2019-10-13 17:43:42,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,123 INFO L225 Difference]: With dead ends: 255 [2019-10-13 17:43:42,123 INFO L226 Difference]: Without dead ends: 169 [2019-10-13 17:43:42,125 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2019-10-13 17:43:42,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2019-10-13 17:43:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 135. [2019-10-13 17:43:42,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-10-13 17:43:42,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 182 transitions. [2019-10-13 17:43:42,138 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 182 transitions. Word has length 31 [2019-10-13 17:43:42,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:42,138 INFO L462 AbstractCegarLoop]: Abstraction has 135 states and 182 transitions. [2019-10-13 17:43:42,138 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 17:43:42,138 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 182 transitions. [2019-10-13 17:43:42,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 17:43:42,139 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:42,140 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:42,344 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,345 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:42,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:42,345 INFO L82 PathProgramCache]: Analyzing trace with hash -320316384, now seen corresponding path program 2 times [2019-10-13 17:43:42,345 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:42,346 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094970742] [2019-10-13 17:43:42,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,346 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:42,346 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:42,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:43:42,445 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094970742] [2019-10-13 17:43:42,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637591563] [2019-10-13 17:43:42,446 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:42,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:42,495 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:42,496 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:43:42,498 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:42,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:43:42,565 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:42,566 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-10-13 17:43:42,566 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022255025] [2019-10-13 17:43:42,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:42,567 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:42,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:42,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:42,567 INFO L87 Difference]: Start difference. First operand 135 states and 182 transitions. Second operand 13 states. [2019-10-13 17:43:42,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:42,986 INFO L93 Difference]: Finished difference Result 335 states and 470 transitions. [2019-10-13 17:43:42,986 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:43:42,987 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2019-10-13 17:43:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:42,988 INFO L225 Difference]: With dead ends: 335 [2019-10-13 17:43:42,989 INFO L226 Difference]: Without dead ends: 215 [2019-10-13 17:43:42,990 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:42,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-10-13 17:43:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 177. [2019-10-13 17:43:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-10-13 17:43:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 239 transitions. [2019-10-13 17:43:43,002 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 239 transitions. Word has length 36 [2019-10-13 17:43:43,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,002 INFO L462 AbstractCegarLoop]: Abstraction has 177 states and 239 transitions. [2019-10-13 17:43:43,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 239 transitions. [2019-10-13 17:43:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 17:43:43,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,004 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:43,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,217 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 19390083, now seen corresponding path program 3 times [2019-10-13 17:43:43,219 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:43,219 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866021066] [2019-10-13 17:43:43,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,220 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:43,220 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:43,351 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:43:43,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866021066] [2019-10-13 17:43:43,352 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896452414] [2019-10-13 17:43:43,352 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:43,426 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-10-13 17:43:43,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:43,428 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:43,435 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:43,498 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:43:43,498 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:43,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 13 [2019-10-13 17:43:43,499 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872253433] [2019-10-13 17:43:43,499 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:43:43,499 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:43,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:43:43,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:43:43,500 INFO L87 Difference]: Start difference. First operand 177 states and 239 transitions. Second operand 13 states. [2019-10-13 17:43:43,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:43,802 INFO L93 Difference]: Finished difference Result 321 states and 441 transitions. [2019-10-13 17:43:43,802 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:43:43,803 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2019-10-13 17:43:43,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:43,804 INFO L225 Difference]: With dead ends: 321 [2019-10-13 17:43:43,805 INFO L226 Difference]: Without dead ends: 187 [2019-10-13 17:43:43,806 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:43,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-10-13 17:43:43,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 183. [2019-10-13 17:43:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2019-10-13 17:43:43,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 247 transitions. [2019-10-13 17:43:43,818 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 247 transitions. Word has length 41 [2019-10-13 17:43:43,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:43,818 INFO L462 AbstractCegarLoop]: Abstraction has 183 states and 247 transitions. [2019-10-13 17:43:43,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:43:43,819 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 247 transitions. [2019-10-13 17:43:43,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 17:43:43,820 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:43,820 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:44,031 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,031 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:44,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:44,032 INFO L82 PathProgramCache]: Analyzing trace with hash -2104379038, now seen corresponding path program 4 times [2019-10-13 17:43:44,032 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:44,033 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109464396] [2019-10-13 17:43:44,033 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,034 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:44,034 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:44,182 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-13 17:43:44,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109464396] [2019-10-13 17:43:44,182 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633009742] [2019-10-13 17:43:44,183 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:44,226 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:43:44,226 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:44,227 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:43:44,229 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:44,363 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:43:44,363 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:44,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-10-13 17:43:44,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462529802] [2019-10-13 17:43:44,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:43:44,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:43:44,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:43:44,369 INFO L87 Difference]: Start difference. First operand 183 states and 247 transitions. Second operand 16 states. [2019-10-13 17:43:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:45,120 INFO L93 Difference]: Finished difference Result 465 states and 656 transitions. [2019-10-13 17:43:45,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 17:43:45,120 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 44 [2019-10-13 17:43:45,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:45,122 INFO L225 Difference]: With dead ends: 465 [2019-10-13 17:43:45,123 INFO L226 Difference]: Without dead ends: 299 [2019-10-13 17:43:45,124 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=897, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 17:43:45,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2019-10-13 17:43:45,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 254. [2019-10-13 17:43:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2019-10-13 17:43:45,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 341 transitions. [2019-10-13 17:43:45,138 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 341 transitions. Word has length 44 [2019-10-13 17:43:45,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:45,138 INFO L462 AbstractCegarLoop]: Abstraction has 254 states and 341 transitions. [2019-10-13 17:43:45,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:43:45,139 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 341 transitions. [2019-10-13 17:43:45,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 17:43:45,140 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:45,140 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:45,345 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,346 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:45,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1468572673, now seen corresponding path program 5 times [2019-10-13 17:43:45,346 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:45,347 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239903620] [2019-10-13 17:43:45,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,347 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:45,347 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:45,463 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-10-13 17:43:45,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239903620] [2019-10-13 17:43:45,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315211972] [2019-10-13 17:43:45,464 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:45,533 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 17:43:45,534 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:45,535 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-13 17:43:45,537 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:45,622 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:43:45,623 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:45,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2019-10-13 17:43:45,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538986529] [2019-10-13 17:43:45,624 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:43:45,624 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:45,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:43:45,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:43:45,625 INFO L87 Difference]: Start difference. First operand 254 states and 341 transitions. Second operand 18 states. [2019-10-13 17:43:46,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:46,510 INFO L93 Difference]: Finished difference Result 598 states and 830 transitions. [2019-10-13 17:43:46,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 17:43:46,510 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 49 [2019-10-13 17:43:46,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:46,513 INFO L225 Difference]: With dead ends: 598 [2019-10-13 17:43:46,513 INFO L226 Difference]: Without dead ends: 363 [2019-10-13 17:43:46,515 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=677, Invalid=1393, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 17:43:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-10-13 17:43:46,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 314. [2019-10-13 17:43:46,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 314 states. [2019-10-13 17:43:46,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 422 transitions. [2019-10-13 17:43:46,531 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 422 transitions. Word has length 49 [2019-10-13 17:43:46,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:46,531 INFO L462 AbstractCegarLoop]: Abstraction has 314 states and 422 transitions. [2019-10-13 17:43:46,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:43:46,532 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 422 transitions. [2019-10-13 17:43:46,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-10-13 17:43:46,533 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:46,533 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:46,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:46,739 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:46,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:46,739 INFO L82 PathProgramCache]: Analyzing trace with hash 629764102, now seen corresponding path program 6 times [2019-10-13 17:43:46,740 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:46,740 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262907698] [2019-10-13 17:43:46,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,740 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:46,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:46,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:46,858 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262907698] [2019-10-13 17:43:46,859 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310686369] [2019-10-13 17:43:46,859 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:46,937 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2019-10-13 17:43:46,937 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:46,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:46,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:46,982 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:46,982 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:46,982 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2019-10-13 17:43:46,983 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984196776] [2019-10-13 17:43:46,983 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 17:43:46,983 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:46,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 17:43:46,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2019-10-13 17:43:46,984 INFO L87 Difference]: Start difference. First operand 314 states and 422 transitions. Second operand 14 states. [2019-10-13 17:43:47,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:47,318 INFO L93 Difference]: Finished difference Result 573 states and 779 transitions. [2019-10-13 17:43:47,318 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:43:47,318 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2019-10-13 17:43:47,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:47,321 INFO L225 Difference]: With dead ends: 573 [2019-10-13 17:43:47,321 INFO L226 Difference]: Without dead ends: 324 [2019-10-13 17:43:47,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:47,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2019-10-13 17:43:47,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 320. [2019-10-13 17:43:47,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 320 states. [2019-10-13 17:43:47,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 430 transitions. [2019-10-13 17:43:47,337 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 430 transitions. Word has length 54 [2019-10-13 17:43:47,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:47,337 INFO L462 AbstractCegarLoop]: Abstraction has 320 states and 430 transitions. [2019-10-13 17:43:47,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 17:43:47,337 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 430 transitions. [2019-10-13 17:43:47,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-10-13 17:43:47,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:47,338 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:47,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,542 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:47,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:47,543 INFO L82 PathProgramCache]: Analyzing trace with hash 951457023, now seen corresponding path program 7 times [2019-10-13 17:43:47,543 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:47,543 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146125962] [2019-10-13 17:43:47,544 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,544 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:47,544 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:47,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-10-13 17:43:47,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146125962] [2019-10-13 17:43:47,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603255712] [2019-10-13 17:43:47,658 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:47,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:43:47,748 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2019-10-13 17:43:47,919 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:47,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2019-10-13 17:43:47,920 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032975783] [2019-10-13 17:43:47,920 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:43:47,921 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:47,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:43:47,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:43:47,922 INFO L87 Difference]: Start difference. First operand 320 states and 430 transitions. Second operand 21 states. [2019-10-13 17:43:49,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:49,394 INFO L93 Difference]: Finished difference Result 780 states and 1092 transitions. [2019-10-13 17:43:49,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-10-13 17:43:49,394 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2019-10-13 17:43:49,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:49,397 INFO L225 Difference]: With dead ends: 780 [2019-10-13 17:43:49,398 INFO L226 Difference]: Without dead ends: 481 [2019-10-13 17:43:49,401 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1348, Invalid=2812, Unknown=0, NotChecked=0, Total=4160 [2019-10-13 17:43:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2019-10-13 17:43:49,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 427. [2019-10-13 17:43:49,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2019-10-13 17:43:49,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 573 transitions. [2019-10-13 17:43:49,421 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 573 transitions. Word has length 57 [2019-10-13 17:43:49,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:49,421 INFO L462 AbstractCegarLoop]: Abstraction has 427 states and 573 transitions. [2019-10-13 17:43:49,422 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:43:49,422 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 573 transitions. [2019-10-13 17:43:49,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-13 17:43:49,422 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:49,423 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:49,625 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:49,626 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:49,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:49,627 INFO L82 PathProgramCache]: Analyzing trace with hash -2073070520, now seen corresponding path program 8 times [2019-10-13 17:43:49,627 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:49,629 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154354029] [2019-10-13 17:43:49,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,629 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:49,629 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-10-13 17:43:49,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154354029] [2019-10-13 17:43:49,868 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506325925] [2019-10-13 17:43:49,869 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:49,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:49,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:49,965 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:43:49,972 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:50,113 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2019-10-13 17:43:50,113 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:50,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2019-10-13 17:43:50,114 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296897669] [2019-10-13 17:43:50,114 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 17:43:50,114 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:50,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 17:43:50,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2019-10-13 17:43:50,115 INFO L87 Difference]: Start difference. First operand 427 states and 573 transitions. Second operand 23 states. [2019-10-13 17:43:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:51,765 INFO L93 Difference]: Finished difference Result 967 states and 1334 transitions. [2019-10-13 17:43:51,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-10-13 17:43:51,766 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 62 [2019-10-13 17:43:51,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:51,769 INFO L225 Difference]: With dead ends: 967 [2019-10-13 17:43:51,769 INFO L226 Difference]: Without dead ends: 563 [2019-10-13 17:43:51,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1901, Invalid=3951, Unknown=0, NotChecked=0, Total=5852 [2019-10-13 17:43:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2019-10-13 17:43:51,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 505. [2019-10-13 17:43:51,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 505 states. [2019-10-13 17:43:51,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 678 transitions. [2019-10-13 17:43:51,803 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 678 transitions. Word has length 62 [2019-10-13 17:43:51,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:51,803 INFO L462 AbstractCegarLoop]: Abstraction has 505 states and 678 transitions. [2019-10-13 17:43:51,804 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 17:43:51,804 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 678 transitions. [2019-10-13 17:43:51,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-10-13 17:43:51,805 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:51,805 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:52,018 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:52,018 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:52,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash 771931099, now seen corresponding path program 9 times [2019-10-13 17:43:52,019 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:52,019 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750522034] [2019-10-13 17:43:52,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:52,019 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:52,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 17:43:52,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750522034] [2019-10-13 17:43:52,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929311880] [2019-10-13 17:43:52,158 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:52,256 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:43:52,256 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:52,258 INFO L256 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:43:52,260 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:52,417 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 43 proven. 19 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2019-10-13 17:43:52,418 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:52,418 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9] total 22 [2019-10-13 17:43:52,418 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028113268] [2019-10-13 17:43:52,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:43:52,419 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:52,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:43:52,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:43:52,420 INFO L87 Difference]: Start difference. First operand 505 states and 678 transitions. Second operand 22 states. [2019-10-13 17:43:53,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:53,053 INFO L93 Difference]: Finished difference Result 959 states and 1298 transitions. [2019-10-13 17:43:53,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:43:53,054 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2019-10-13 17:43:53,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:53,057 INFO L225 Difference]: With dead ends: 959 [2019-10-13 17:43:53,057 INFO L226 Difference]: Without dead ends: 515 [2019-10-13 17:43:53,059 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=721, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:43:53,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2019-10-13 17:43:53,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 511. [2019-10-13 17:43:53,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 511 states. [2019-10-13 17:43:53,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 685 transitions. [2019-10-13 17:43:53,091 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 685 transitions. Word has length 67 [2019-10-13 17:43:53,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:53,092 INFO L462 AbstractCegarLoop]: Abstraction has 511 states and 685 transitions. [2019-10-13 17:43:53,092 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:43:53,092 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 685 transitions. [2019-10-13 17:43:53,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-10-13 17:43:53,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:53,093 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:53,306 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:53,307 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:53,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:53,307 INFO L82 PathProgramCache]: Analyzing trace with hash -434656372, now seen corresponding path program 1 times [2019-10-13 17:43:53,307 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:53,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068245331] [2019-10-13 17:43:53,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:53,308 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:53,308 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:53,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,474 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-13 17:43:53,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068245331] [2019-10-13 17:43:53,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052377474] [2019-10-13 17:43:53,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:53,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:53,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-13 17:43:53,559 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2019-10-13 17:43:53,702 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:53,702 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 26 [2019-10-13 17:43:53,702 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831643970] [2019-10-13 17:43:53,703 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 17:43:53,707 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 17:43:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2019-10-13 17:43:53,709 INFO L87 Difference]: Start difference. First operand 511 states and 685 transitions. Second operand 26 states. [2019-10-13 17:43:56,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:56,200 INFO L93 Difference]: Finished difference Result 1197 states and 1662 transitions. [2019-10-13 17:43:56,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-10-13 17:43:56,201 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 70 [2019-10-13 17:43:56,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:56,205 INFO L225 Difference]: With dead ends: 1197 [2019-10-13 17:43:56,205 INFO L226 Difference]: Without dead ends: 711 [2019-10-13 17:43:56,210 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2896 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3257, Invalid=6843, Unknown=0, NotChecked=0, Total=10100 [2019-10-13 17:43:56,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2019-10-13 17:43:56,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 649. [2019-10-13 17:43:56,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 649 states. [2019-10-13 17:43:56,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 870 transitions. [2019-10-13 17:43:56,235 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 870 transitions. Word has length 70 [2019-10-13 17:43:56,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:56,236 INFO L462 AbstractCegarLoop]: Abstraction has 649 states and 870 transitions. [2019-10-13 17:43:56,236 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 17:43:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 870 transitions. [2019-10-13 17:43:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-10-13 17:43:56,237 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:56,237 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:43:56,441 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:56,441 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:43:56,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:43:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1664036841, now seen corresponding path program 2 times [2019-10-13 17:43:56,442 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:43:56,443 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071413072] [2019-10-13 17:43:56,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:56,443 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:43:56,443 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:43:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:56,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:43:56,612 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2019-10-13 17:43:56,612 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071413072] [2019-10-13 17:43:56,613 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493451678] [2019-10-13 17:43:56,613 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:43:56,726 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:43:56,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:43:56,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:43:56,731 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:43:56,940 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2019-10-13 17:43:56,940 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:43:56,941 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2019-10-13 17:43:56,941 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681147645] [2019-10-13 17:43:56,941 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:43:56,942 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:43:56,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:43:56,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:43:56,943 INFO L87 Difference]: Start difference. First operand 649 states and 870 transitions. Second operand 28 states. [2019-10-13 17:43:59,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:43:59,817 INFO L93 Difference]: Finished difference Result 1433 states and 1966 transitions. [2019-10-13 17:43:59,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2019-10-13 17:43:59,818 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 75 [2019-10-13 17:43:59,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:43:59,823 INFO L225 Difference]: With dead ends: 1433 [2019-10-13 17:43:59,824 INFO L226 Difference]: Without dead ends: 811 [2019-10-13 17:43:59,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3972 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4313, Invalid=9027, Unknown=0, NotChecked=0, Total=13340 [2019-10-13 17:43:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2019-10-13 17:43:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 745. [2019-10-13 17:43:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 745 states. [2019-10-13 17:43:59,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 999 transitions. [2019-10-13 17:43:59,876 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 999 transitions. Word has length 75 [2019-10-13 17:43:59,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:43:59,877 INFO L462 AbstractCegarLoop]: Abstraction has 745 states and 999 transitions. [2019-10-13 17:43:59,877 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:43:59,877 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 999 transitions. [2019-10-13 17:43:59,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-13 17:43:59,878 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:43:59,878 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:00,083 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:00,084 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:00,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:00,084 INFO L82 PathProgramCache]: Analyzing trace with hash 2132512176, now seen corresponding path program 3 times [2019-10-13 17:44:00,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:00,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251703268] [2019-10-13 17:44:00,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:00,086 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:00,421 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2019-10-13 17:44:00,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251703268] [2019-10-13 17:44:00,422 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160561349] [2019-10-13 17:44:00,422 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:00,733 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-13 17:44:00,734 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:00,737 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:44:00,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2019-10-13 17:44:01,062 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:01,062 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2019-10-13 17:44:01,062 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478433636] [2019-10-13 17:44:01,064 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 17:44:01,065 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:01,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 17:44:01,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2019-10-13 17:44:01,066 INFO L87 Difference]: Start difference. First operand 745 states and 999 transitions. Second operand 30 states. [2019-10-13 17:44:04,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:04,597 INFO L93 Difference]: Finished difference Result 1633 states and 2238 transitions. [2019-10-13 17:44:04,597 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2019-10-13 17:44:04,597 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 80 [2019-10-13 17:44:04,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:04,602 INFO L225 Difference]: With dead ends: 1633 [2019-10-13 17:44:04,603 INFO L226 Difference]: Without dead ends: 917 [2019-10-13 17:44:04,611 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5604, Invalid=11688, Unknown=0, NotChecked=0, Total=17292 [2019-10-13 17:44:04,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2019-10-13 17:44:04,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 847. [2019-10-13 17:44:04,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 847 states. [2019-10-13 17:44:04,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 847 states to 847 states and 1136 transitions. [2019-10-13 17:44:04,664 INFO L78 Accepts]: Start accepts. Automaton has 847 states and 1136 transitions. Word has length 80 [2019-10-13 17:44:04,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:04,665 INFO L462 AbstractCegarLoop]: Abstraction has 847 states and 1136 transitions. [2019-10-13 17:44:04,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 17:44:04,665 INFO L276 IsEmpty]: Start isEmpty. Operand 847 states and 1136 transitions. [2019-10-13 17:44:04,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-10-13 17:44:04,666 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:04,666 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:04,871 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:04,871 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:04,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:04,872 INFO L82 PathProgramCache]: Analyzing trace with hash -851661325, now seen corresponding path program 4 times [2019-10-13 17:44:04,872 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:04,872 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925950951] [2019-10-13 17:44:04,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:04,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:04,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:04,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:05,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2019-10-13 17:44:05,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925950951] [2019-10-13 17:44:05,093 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687638164] [2019-10-13 17:44:05,093 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:05,189 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:44:05,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:05,190 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-13 17:44:05,191 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:05,361 INFO L134 CoverageAnalysis]: Checked inductivity of 431 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2019-10-13 17:44:05,362 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:05,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2019-10-13 17:44:05,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623859047] [2019-10-13 17:44:05,363 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 17:44:05,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:05,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 17:44:05,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2019-10-13 17:44:05,364 INFO L87 Difference]: Start difference. First operand 847 states and 1136 transitions. Second operand 32 states. [2019-10-13 17:44:09,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:09,620 INFO L93 Difference]: Finished difference Result 1845 states and 2526 transitions. [2019-10-13 17:44:09,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2019-10-13 17:44:09,620 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 85 [2019-10-13 17:44:09,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:09,626 INFO L225 Difference]: With dead ends: 1845 [2019-10-13 17:44:09,626 INFO L226 Difference]: Without dead ends: 1029 [2019-10-13 17:44:09,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6982 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=7162, Invalid=14890, Unknown=0, NotChecked=0, Total=22052 [2019-10-13 17:44:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1029 states. [2019-10-13 17:44:09,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1029 to 955. [2019-10-13 17:44:09,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 955 states. [2019-10-13 17:44:09,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 1281 transitions. [2019-10-13 17:44:09,673 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 1281 transitions. Word has length 85 [2019-10-13 17:44:09,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:09,673 INFO L462 AbstractCegarLoop]: Abstraction has 955 states and 1281 transitions. [2019-10-13 17:44:09,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 17:44:09,674 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 1281 transitions. [2019-10-13 17:44:09,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-13 17:44:09,675 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:09,675 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:09,879 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:09,879 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:09,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:09,880 INFO L82 PathProgramCache]: Analyzing trace with hash 518619092, now seen corresponding path program 5 times [2019-10-13 17:44:09,880 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:09,880 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127251508] [2019-10-13 17:44:09,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,881 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:09,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:09,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:10,138 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-13 17:44:10,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127251508] [2019-10-13 17:44:10,138 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156458037] [2019-10-13 17:44:10,138 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:10,447 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-13 17:44:10,448 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:10,450 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:44:10,452 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-10-13 17:44:10,663 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:10,663 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2019-10-13 17:44:10,663 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588241720] [2019-10-13 17:44:10,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 17:44:10,664 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:10,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 17:44:10,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=832, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 17:44:10,665 INFO L87 Difference]: Start difference. First operand 955 states and 1281 transitions. Second operand 34 states. [2019-10-13 17:44:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:44:15,586 INFO L93 Difference]: Finished difference Result 2069 states and 2830 transitions. [2019-10-13 17:44:15,587 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2019-10-13 17:44:15,587 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 90 [2019-10-13 17:44:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:44:15,594 INFO L225 Difference]: With dead ends: 2069 [2019-10-13 17:44:15,594 INFO L226 Difference]: Without dead ends: 1147 [2019-10-13 17:44:15,598 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9003 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=9021, Invalid=18701, Unknown=0, NotChecked=0, Total=27722 [2019-10-13 17:44:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2019-10-13 17:44:15,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 1069. [2019-10-13 17:44:15,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1069 states. [2019-10-13 17:44:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1069 states to 1069 states and 1434 transitions. [2019-10-13 17:44:15,642 INFO L78 Accepts]: Start accepts. Automaton has 1069 states and 1434 transitions. Word has length 90 [2019-10-13 17:44:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:44:15,643 INFO L462 AbstractCegarLoop]: Abstraction has 1069 states and 1434 transitions. [2019-10-13 17:44:15,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 17:44:15,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1069 states and 1434 transitions. [2019-10-13 17:44:15,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-10-13 17:44:15,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:44:15,644 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:44:15,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:15,849 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:44:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:44:15,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1025811505, now seen corresponding path program 6 times [2019-10-13 17:44:15,850 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:44:15,850 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752300005] [2019-10-13 17:44:15,850 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:15,851 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:44:15,851 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:44:15,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:44:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2019-10-13 17:44:16,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752300005] [2019-10-13 17:44:16,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346038113] [2019-10-13 17:44:16,080 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:44:16,795 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:44:16,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:44:16,798 INFO L256 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:44:16,800 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:44:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 27 proven. 376 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2019-10-13 17:44:16,872 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:44:16,872 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 25 [2019-10-13 17:44:16,873 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65737221] [2019-10-13 17:44:16,873 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:44:16,873 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:44:16,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:44:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:44:16,874 INFO L87 Difference]: Start difference. First operand 1069 states and 1434 transitions. Second operand 25 states.