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/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:45:54,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:45:54,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:45:54,448 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:45:54,449 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:45:54,450 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:45:54,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:45:54,453 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:45:54,455 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:45:54,455 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:45:54,456 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:45:54,457 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:45:54,458 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:45:54,459 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:45:54,460 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:45:54,461 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:45:54,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:45:54,463 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:45:54,464 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:45:54,467 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:45:54,468 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:45:54,469 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:45:54,470 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:45:54,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:45:54,474 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 21:45:54,477 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:45:54,478 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:45:54,479 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:45:54,480 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:45:54,481 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:45:54,481 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:45:54,482 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:45:54,482 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:45:54,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:45:54,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:45:54,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:45:54,485 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:45:54,503 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:45:54,503 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:45:54,504 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:45:54,505 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:45:54,505 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:45:54,505 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:45:54,505 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:45:54,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:45:54,506 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:45:54,506 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:45:54,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:45:54,507 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:45:54,507 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:45:54,507 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:45:54,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:45:54,508 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:45:54,508 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:45:54,508 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:45:54,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:45:54,508 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:45:54,509 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:45:54,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:54,509 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:45:54,510 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:45:54,510 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:45:54,510 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:45:54,510 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:45:54,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:45:54,511 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:45:54,806 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:45:54,829 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:45:54,833 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:45:54,834 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:45:54,834 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:45:54,835 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-10-14 21:45:54,895 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/762910019/e695671988d44503946879847322f5f1/FLAGaaaedd3bb [2019-10-14 21:45:55,336 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:45:55,337 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-10-14 21:45:55,342 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/762910019/e695671988d44503946879847322f5f1/FLAGaaaedd3bb [2019-10-14 21:45:55,704 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/762910019/e695671988d44503946879847322f5f1 [2019-10-14 21:45:55,714 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:45:55,716 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:45:55,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:55,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:45:55,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:45:55,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:55" (1/1) ... [2019-10-14 21:45:55,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10da5ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:55, skipping insertion in model container [2019-10-14 21:45:55,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:45:55" (1/1) ... [2019-10-14 21:45:55,737 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:45:55,755 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:45:56,018 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:56,030 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:45:56,060 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:45:56,085 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:45:56,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56 WrapperNode [2019-10-14 21:45:56,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:45:56,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:45:56,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:45:56,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:45:56,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... [2019-10-14 21:45:56,237 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... [2019-10-14 21:45:56,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... [2019-10-14 21:45:56,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... [2019-10-14 21:45:56,268 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... [2019-10-14 21:45:56,277 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... [2019-10-14 21:45:56,283 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... [2019-10-14 21:45:56,287 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:45:56,288 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:45:56,288 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:45:56,288 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:45:56,289 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:45:56,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:45:56,354 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:45:56,355 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:45:56,355 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:45:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:45:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:45:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:45:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:45:56,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:45:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:45:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:45:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:45:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:45:56,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:45:56,604 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:45:56,604 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-14 21:45:56,616 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:56 BoogieIcfgContainer [2019-10-14 21:45:56,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:45:56,618 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:45:56,618 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:45:56,629 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:45:56,630 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:45:55" (1/3) ... [2019-10-14 21:45:56,634 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61aef052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:56, skipping insertion in model container [2019-10-14 21:45:56,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:45:56" (2/3) ... [2019-10-14 21:45:56,635 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61aef052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:45:56, skipping insertion in model container [2019-10-14 21:45:56,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:45:56" (3/3) ... [2019-10-14 21:45:56,641 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2019-10-14 21:45:56,669 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:45:56,679 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:45:56,694 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:45:56,723 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:45:56,723 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:45:56,723 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:45:56,723 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:45:56,724 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:45:56,724 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:45:56,724 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:45:56,724 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:45:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-14 21:45:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:45:56,747 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:56,748 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:56,749 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:56,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:56,754 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2019-10-14 21:45:56,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:56,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484511205] [2019-10-14 21:45:56,761 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:56,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:56,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:56,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:56,919 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:56,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484511205] [2019-10-14 21:45:56,921 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:56,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:45:56,922 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859231753] [2019-10-14 21:45:56,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:45:56,927 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:56,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:45:56,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:56,949 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-14 21:45:57,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:57,042 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-10-14 21:45:57,042 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:45:57,043 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-14 21:45:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:57,050 INFO L225 Difference]: With dead ends: 48 [2019-10-14 21:45:57,051 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 21:45:57,055 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:45:57,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 21:45:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 21:45:57,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 21:45:57,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-14 21:45:57,099 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-14 21:45:57,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:57,099 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-14 21:45:57,099 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:45:57,100 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-14 21:45:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-14 21:45:57,101 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:57,101 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:57,101 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2019-10-14 21:45:57,102 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:57,103 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639009553] [2019-10-14 21:45:57,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:57,103 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:57,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:57,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:45:57,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639009553] [2019-10-14 21:45:57,171 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:45:57,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:45:57,171 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695367311] [2019-10-14 21:45:57,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:45:57,174 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:57,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:45:57,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:57,174 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-14 21:45:57,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:57,275 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:45:57,275 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:45:57,276 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-14 21:45:57,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:57,277 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:45:57,277 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:45:57,279 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:45:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:45:57,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-10-14 21:45:57,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 21:45:57,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-14 21:45:57,287 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2019-10-14 21:45:57,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:57,287 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-14 21:45:57,288 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:45:57,288 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-14 21:45:57,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:45:57,289 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:57,289 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:57,289 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:57,290 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2019-10-14 21:45:57,290 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:57,290 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699253860] [2019-10-14 21:45:57,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:57,291 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:57,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:57,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:57,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699253860] [2019-10-14 21:45:57,398 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746632116] [2019-10-14 21:45:57,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:57,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:45:57,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:45:57,504 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:57,504 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-14 21:45:57,505 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882731396] [2019-10-14 21:45:57,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:45:57,506 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:57,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:45:57,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:57,507 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-14 21:45:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:57,637 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-10-14 21:45:57,637 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:45:57,637 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-14 21:45:57,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:57,639 INFO L225 Difference]: With dead ends: 49 [2019-10-14 21:45:57,639 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 21:45:57,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:45:57,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 21:45:57,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-14 21:45:57,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 21:45:57,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-14 21:45:57,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-10-14 21:45:57,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:57,648 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-14 21:45:57,648 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:45:57,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-14 21:45:57,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 21:45:57,649 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:57,649 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:57,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:57,853 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:57,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1510721175, now seen corresponding path program 2 times [2019-10-14 21:45:57,854 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:57,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490230810] [2019-10-14 21:45:57,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:57,855 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:57,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:57,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:57,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:57,961 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:57,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490230810] [2019-10-14 21:45:57,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543379924] [2019-10-14 21:45:57,962 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:58,028 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:45:58,029 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:58,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:45:58,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:58,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:45:58,047 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:58,047 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-14 21:45:58,047 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921759462] [2019-10-14 21:45:58,048 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:45:58,048 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:58,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:45:58,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:58,049 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-10-14 21:45:58,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:58,150 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2019-10-14 21:45:58,150 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:45:58,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-14 21:45:58,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:58,152 INFO L225 Difference]: With dead ends: 57 [2019-10-14 21:45:58,152 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:45:58,152 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:45:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:45:58,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-10-14 21:45:58,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 21:45:58,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-14 21:45:58,160 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2019-10-14 21:45:58,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:58,160 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-14 21:45:58,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:45:58,160 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-14 21:45:58,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 21:45:58,162 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:58,162 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:58,367 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:58,368 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -235287899, now seen corresponding path program 3 times [2019-10-14 21:45:58,369 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:58,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776424872] [2019-10-14 21:45:58,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:58,369 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:58,370 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:45:58,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776424872] [2019-10-14 21:45:58,468 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126470785] [2019-10-14 21:45:58,468 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:58,512 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:45:58,512 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:45:58,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:45:58,516 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:58,651 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:45:58,652 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:45:58,658 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:45:58,658 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:45:58,659 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:45:58,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:45:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-14 21:45:58,715 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:58,716 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-10-14 21:45:58,716 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10620538] [2019-10-14 21:45:58,717 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:45:58,717 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:58,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:45:58,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:45:58,718 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 15 states. [2019-10-14 21:45:59,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:59,188 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2019-10-14 21:45:59,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:45:59,189 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-10-14 21:45:59,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:59,192 INFO L225 Difference]: With dead ends: 88 [2019-10-14 21:45:59,193 INFO L226 Difference]: Without dead ends: 66 [2019-10-14 21:45:59,194 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=517, Unknown=0, NotChecked=0, Total=650 [2019-10-14 21:45:59,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-14 21:45:59,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2019-10-14 21:45:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-14 21:45:59,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-10-14 21:45:59,210 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2019-10-14 21:45:59,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:59,210 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-10-14 21:45:59,210 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:45:59,211 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-10-14 21:45:59,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 21:45:59,212 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:59,212 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:59,421 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:59,421 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:59,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:59,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1110475037, now seen corresponding path program 1 times [2019-10-14 21:45:59,423 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:59,424 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948871485] [2019-10-14 21:45:59,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:59,424 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:59,425 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:45:59,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:59,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:59,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:45:59,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948871485] [2019-10-14 21:45:59,555 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8102672] [2019-10-14 21:45:59,555 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 [2019-10-14 21:45:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:45:59,619 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:45:59,626 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:45:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-14 21:45:59,651 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:45:59,651 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-14 21:45:59,651 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901733648] [2019-10-14 21:45:59,652 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:45:59,653 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:45:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:45:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:59,653 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 9 states. [2019-10-14 21:45:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:45:59,771 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2019-10-14 21:45:59,772 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-14 21:45:59,772 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-10-14 21:45:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:45:59,776 INFO L225 Difference]: With dead ends: 108 [2019-10-14 21:45:59,776 INFO L226 Difference]: Without dead ends: 68 [2019-10-14 21:45:59,777 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:45:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-14 21:45:59,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2019-10-14 21:45:59,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-14 21:45:59,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2019-10-14 21:45:59,787 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 35 [2019-10-14 21:45:59,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:45:59,787 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2019-10-14 21:45:59,787 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:45:59,787 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2019-10-14 21:45:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:45:59,788 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:45:59,789 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:45:59,992 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:45:59,992 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:45:59,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:45:59,993 INFO L82 PathProgramCache]: Analyzing trace with hash -194968281, now seen corresponding path program 2 times [2019-10-14 21:45:59,994 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:45:59,994 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546189360] [2019-10-14 21:45:59,994 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:59,995 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:45:59,995 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,127 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:00,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546189360] [2019-10-14 21:46:00,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974532457] [2019-10-14 21:46:00,128 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 [2019-10-14 21:46:00,174 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:00,175 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:00,175 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-14 21:46:00,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-14 21:46:00,202 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:00,202 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-14 21:46:00,202 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135470965] [2019-10-14 21:46:00,203 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 21:46:00,203 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:00,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 21:46:00,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:00,204 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 10 states. [2019-10-14 21:46:00,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:00,321 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-10-14 21:46:00,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:46:00,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-10-14 21:46:00,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:00,323 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:46:00,323 INFO L226 Difference]: Without dead ends: 76 [2019-10-14 21:46:00,324 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:46:00,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-14 21:46:00,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2019-10-14 21:46:00,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:46:00,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2019-10-14 21:46:00,334 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 40 [2019-10-14 21:46:00,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:00,334 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2019-10-14 21:46:00,334 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 21:46:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2019-10-14 21:46:00,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:46:00,336 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:00,336 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:00,544 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:00,545 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1343481249, now seen corresponding path program 3 times [2019-10-14 21:46:00,546 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:00,546 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695863167] [2019-10-14 21:46:00,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:00,546 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:00,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-14 21:46:00,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695863167] [2019-10-14 21:46:00,666 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101240398] [2019-10-14 21:46:00,666 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 [2019-10-14 21:46:00,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:46:00,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:00,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:46:00,733 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:00,921 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:00,921 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-10-14 21:46:00,922 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:00,924 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:00,928 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:00,929 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:00,929 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:46:00,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-14 21:46:00,994 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:00,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-10-14 21:46:00,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104270091] [2019-10-14 21:46:00,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:46:00,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:00,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:46:00,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:46:00,996 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 20 states. [2019-10-14 21:46:02,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:02,242 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2019-10-14 21:46:02,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-14 21:46:02,243 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2019-10-14 21:46:02,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:02,245 INFO L225 Difference]: With dead ends: 148 [2019-10-14 21:46:02,245 INFO L226 Difference]: Without dead ends: 96 [2019-10-14 21:46:02,248 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=617, Invalid=2353, Unknown=0, NotChecked=0, Total=2970 [2019-10-14 21:46:02,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-14 21:46:02,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 61. [2019-10-14 21:46:02,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-14 21:46:02,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-10-14 21:46:02,257 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 45 [2019-10-14 21:46:02,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:02,258 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-10-14 21:46:02,258 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:46:02,258 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-10-14 21:46:02,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-14 21:46:02,259 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:02,259 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:02,468 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:02,469 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:02,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:02,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1086899484, now seen corresponding path program 1 times [2019-10-14 21:46:02,470 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:02,470 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366488350] [2019-10-14 21:46:02,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,471 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:02,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-14 21:46:02,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366488350] [2019-10-14 21:46:02,605 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514419008] [2019-10-14 21:46:02,605 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:02,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:02,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:46:02,658 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-14 21:46:02,682 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:02,682 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-14 21:46:02,682 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409418393] [2019-10-14 21:46:02,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 21:46:02,683 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:02,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 21:46:02,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:02,684 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 12 states. [2019-10-14 21:46:02,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:02,838 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2019-10-14 21:46:02,838 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:46:02,839 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-14 21:46:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:02,840 INFO L225 Difference]: With dead ends: 109 [2019-10-14 21:46:02,841 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:46:02,842 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-14 21:46:02,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:46:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-14 21:46:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 21:46:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-10-14 21:46:02,851 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 58 [2019-10-14 21:46:02,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:02,851 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-10-14 21:46:02,851 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 21:46:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-10-14 21:46:02,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-14 21:46:02,852 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:02,853 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:03,056 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:03,057 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:03,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash -957205740, now seen corresponding path program 2 times [2019-10-14 21:46:03,058 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:03,058 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637779576] [2019-10-14 21:46:03,058 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,059 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,059 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:03,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,189 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-14 21:46:03,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637779576] [2019-10-14 21:46:03,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852150797] [2019-10-14 21:46:03,189 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:03,240 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:03,241 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:03,242 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:46:03,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-14 21:46:03,277 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:03,277 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-14 21:46:03,278 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920195020] [2019-10-14 21:46:03,278 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 21:46:03,278 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:03,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 21:46:03,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:03,279 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 13 states. [2019-10-14 21:46:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:03,436 INFO L93 Difference]: Finished difference Result 117 states and 140 transitions. [2019-10-14 21:46:03,438 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 21:46:03,438 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-10-14 21:46:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:03,439 INFO L225 Difference]: With dead ends: 117 [2019-10-14 21:46:03,439 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:46:03,440 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:46:03,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:46:03,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-10-14 21:46:03,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:46:03,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2019-10-14 21:46:03,449 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 63 [2019-10-14 21:46:03,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:03,449 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2019-10-14 21:46:03,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 21:46:03,450 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2019-10-14 21:46:03,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-14 21:46:03,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:03,451 INFO L380 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:03,659 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:03,660 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:03,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:03,660 INFO L82 PathProgramCache]: Analyzing trace with hash 995106664, now seen corresponding path program 3 times [2019-10-14 21:46:03,660 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:03,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628483286] [2019-10-14 21:46:03,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,661 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:03,662 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:03,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:03,815 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-14 21:46:03,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628483286] [2019-10-14 21:46:03,816 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579686703] [2019-10-14 21:46:03,816 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:03,875 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:46:03,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:03,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:46:03,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:04,025 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:46:04,026 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:04,028 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:04,028 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:04,028 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:46:04,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:04,095 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-10-14 21:46:04,096 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:04,096 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-10-14 21:46:04,096 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221316613] [2019-10-14 21:46:04,097 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:46:04,097 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:04,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:46:04,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:46:04,098 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 25 states. [2019-10-14 21:46:05,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:05,113 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2019-10-14 21:46:05,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 21:46:05,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 68 [2019-10-14 21:46:05,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:05,116 INFO L225 Difference]: With dead ends: 167 [2019-10-14 21:46:05,116 INFO L226 Difference]: Without dead ends: 121 [2019-10-14 21:46:05,118 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2019-10-14 21:46:05,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-14 21:46:05,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2019-10-14 21:46:05,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-14 21:46:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2019-10-14 21:46:05,132 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 68 [2019-10-14 21:46:05,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:05,133 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2019-10-14 21:46:05,133 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:46:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2019-10-14 21:46:05,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-14 21:46:05,135 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:05,136 INFO L380 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:05,339 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:05,339 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:05,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:05,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1767766386, now seen corresponding path program 1 times [2019-10-14 21:46:05,340 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:05,340 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234849855] [2019-10-14 21:46:05,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,340 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:05,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,512 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-14 21:46:05,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234849855] [2019-10-14 21:46:05,513 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644155828] [2019-10-14 21:46:05,513 INFO L94 rtionOrderModulation]: Keeping assertion order 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 [2019-10-14 21:46:05,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:05,570 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 21:46:05,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-14 21:46:05,596 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:05,596 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-14 21:46:05,596 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708846135] [2019-10-14 21:46:05,597 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:46:05,597 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:05,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:46:05,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:05,598 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand 15 states. [2019-10-14 21:46:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:05,770 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2019-10-14 21:46:05,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 21:46:05,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2019-10-14 21:46:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:05,772 INFO L225 Difference]: With dead ends: 206 [2019-10-14 21:46:05,772 INFO L226 Difference]: Without dead ends: 123 [2019-10-14 21:46:05,773 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:46:05,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-14 21:46:05,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2019-10-14 21:46:05,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-14 21:46:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2019-10-14 21:46:05,791 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 73 [2019-10-14 21:46:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:05,792 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2019-10-14 21:46:05,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:46:05,792 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2019-10-14 21:46:05,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-14 21:46:05,794 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:05,794 INFO L380 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:05,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:05,995 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:05,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:05,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1854631914, now seen corresponding path program 2 times [2019-10-14 21:46:05,996 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:05,997 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552580522] [2019-10-14 21:46:05,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,997 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:05,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,162 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-10-14 21:46:06,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552580522] [2019-10-14 21:46:06,162 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922981841] [2019-10-14 21:46:06,163 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 [2019-10-14 21:46:06,247 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:06,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:06,249 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 21:46:06,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-14 21:46:06,295 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:06,295 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-14 21:46:06,295 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830623620] [2019-10-14 21:46:06,296 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 21:46:06,297 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:06,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 21:46:06,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:06,298 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand 16 states. [2019-10-14 21:46:06,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:06,512 INFO L93 Difference]: Finished difference Result 220 states and 272 transitions. [2019-10-14 21:46:06,513 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 21:46:06,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-14 21:46:06,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:06,514 INFO L225 Difference]: With dead ends: 220 [2019-10-14 21:46:06,515 INFO L226 Difference]: Without dead ends: 131 [2019-10-14 21:46:06,518 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-14 21:46:06,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-14 21:46:06,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2019-10-14 21:46:06,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-14 21:46:06,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2019-10-14 21:46:06,534 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 78 [2019-10-14 21:46:06,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:06,534 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2019-10-14 21:46:06,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 21:46:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2019-10-14 21:46:06,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-14 21:46:06,537 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:06,537 INFO L380 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:06,741 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:06,742 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:06,742 INFO L82 PathProgramCache]: Analyzing trace with hash -2005840374, now seen corresponding path program 3 times [2019-10-14 21:46:06,743 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:06,743 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264179682] [2019-10-14 21:46:06,743 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,743 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:06,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:06,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-10-14 21:46:06,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264179682] [2019-10-14 21:46:06,915 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443527914] [2019-10-14 21:46:06,915 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 [2019-10-14 21:46:06,998 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 21:46:06,998 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:06,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:46:07,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:07,453 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:07,454 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-10-14 21:46:07,454 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:07,455 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:07,460 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:07,461 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:07,461 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:46:07,482 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 29 proven. 59 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-10-14 21:46:07,548 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:07,548 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-10-14 21:46:07,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276868941] [2019-10-14 21:46:07,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 21:46:07,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:07,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 21:46:07,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2019-10-14 21:46:07,551 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand 31 states. [2019-10-14 21:46:10,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:10,432 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2019-10-14 21:46:10,432 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-10-14 21:46:10,433 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2019-10-14 21:46:10,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:10,435 INFO L225 Difference]: With dead ends: 258 [2019-10-14 21:46:10,435 INFO L226 Difference]: Without dead ends: 163 [2019-10-14 21:46:10,438 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1734, Invalid=7008, Unknown=0, NotChecked=0, Total=8742 [2019-10-14 21:46:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-10-14 21:46:10,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 99. [2019-10-14 21:46:10,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-14 21:46:10,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2019-10-14 21:46:10,446 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 83 [2019-10-14 21:46:10,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:10,447 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2019-10-14 21:46:10,447 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 21:46:10,447 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2019-10-14 21:46:10,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-14 21:46:10,448 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:10,448 INFO L380 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:10,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,649 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:10,650 INFO L82 PathProgramCache]: Analyzing trace with hash 343721127, now seen corresponding path program 4 times [2019-10-14 21:46:10,650 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:10,650 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390654079] [2019-10-14 21:46:10,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,651 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:10,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:10,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:10,828 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-10-14 21:46:10,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390654079] [2019-10-14 21:46:10,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771128576] [2019-10-14 21:46:10,829 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:10,896 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:10,896 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:10,898 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-14 21:46:10,900 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-10-14 21:46:10,918 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:10,919 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-14 21:46:10,919 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972516904] [2019-10-14 21:46:10,919 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 21:46:10,919 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:10,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 21:46:10,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:10,920 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 18 states. [2019-10-14 21:46:11,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:11,142 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2019-10-14 21:46:11,143 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:46:11,143 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2019-10-14 21:46:11,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:11,144 INFO L225 Difference]: With dead ends: 173 [2019-10-14 21:46:11,145 INFO L226 Difference]: Without dead ends: 107 [2019-10-14 21:46:11,146 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-14 21:46:11,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-14 21:46:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2019-10-14 21:46:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-14 21:46:11,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2019-10-14 21:46:11,158 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 96 [2019-10-14 21:46:11,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:11,159 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2019-10-14 21:46:11,159 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 21:46:11,159 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2019-10-14 21:46:11,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-14 21:46:11,161 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:11,161 INFO L380 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:11,366 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:11,366 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:11,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:11,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1246669377, now seen corresponding path program 5 times [2019-10-14 21:46:11,367 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:11,367 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677252729] [2019-10-14 21:46:11,367 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,367 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:11,368 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2019-10-14 21:46:11,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677252729] [2019-10-14 21:46:11,583 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187801461] [2019-10-14 21:46:11,583 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:11,803 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-14 21:46:11,803 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:11,805 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-14 21:46:11,806 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:11,823 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-14 21:46:11,823 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:11,823 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-14 21:46:11,824 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894080043] [2019-10-14 21:46:11,824 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:46:11,824 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:11,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:46:11,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:11,825 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 19 states. [2019-10-14 21:46:12,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:12,028 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2019-10-14 21:46:12,028 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:46:12,028 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 101 [2019-10-14 21:46:12,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:12,029 INFO L225 Difference]: With dead ends: 181 [2019-10-14 21:46:12,029 INFO L226 Difference]: Without dead ends: 112 [2019-10-14 21:46:12,031 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:46:12,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-14 21:46:12,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2019-10-14 21:46:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-14 21:46:12,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2019-10-14 21:46:12,040 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 101 [2019-10-14 21:46:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:12,042 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2019-10-14 21:46:12,042 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:46:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2019-10-14 21:46:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-14 21:46:12,043 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:12,043 INFO L380 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:12,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:12,247 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:12,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:12,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1730536149, now seen corresponding path program 6 times [2019-10-14 21:46:12,248 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:12,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701061214] [2019-10-14 21:46:12,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,249 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:12,249 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:12,448 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-14 21:46:12,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701061214] [2019-10-14 21:46:12,449 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485616012] [2019-10-14 21:46:12,449 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:12,764 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-14 21:46:12,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:12,766 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-14 21:46:12,767 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-10-14 21:46:12,797 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:12,797 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-14 21:46:12,798 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606758277] [2019-10-14 21:46:12,798 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 21:46:12,798 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:12,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 21:46:12,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:46:12,799 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 20 states. [2019-10-14 21:46:13,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:13,003 INFO L93 Difference]: Finished difference Result 189 states and 226 transitions. [2019-10-14 21:46:13,013 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 21:46:13,013 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2019-10-14 21:46:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:13,014 INFO L225 Difference]: With dead ends: 189 [2019-10-14 21:46:13,014 INFO L226 Difference]: Without dead ends: 117 [2019-10-14 21:46:13,015 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-14 21:46:13,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-14 21:46:13,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2019-10-14 21:46:13,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-14 21:46:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2019-10-14 21:46:13,023 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 106 [2019-10-14 21:46:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:13,023 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2019-10-14 21:46:13,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 21:46:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2019-10-14 21:46:13,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-14 21:46:13,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:13,025 INFO L380 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:13,233 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,233 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:13,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:13,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1419636421, now seen corresponding path program 7 times [2019-10-14 21:46:13,234 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:13,234 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758669961] [2019-10-14 21:46:13,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,235 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:13,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:13,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2019-10-14 21:46:13,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758669961] [2019-10-14 21:46:13,450 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68273940] [2019-10-14 21:46:13,451 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:13,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:13,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 21:46:13,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-14 21:46:13,557 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:13,557 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-14 21:46:13,557 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855628401] [2019-10-14 21:46:13,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 21:46:13,558 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:13,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 21:46:13,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:13,559 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 21 states. [2019-10-14 21:46:13,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:13,797 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2019-10-14 21:46:13,797 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 21:46:13,797 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2019-10-14 21:46:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:13,799 INFO L225 Difference]: With dead ends: 197 [2019-10-14 21:46:13,799 INFO L226 Difference]: Without dead ends: 122 [2019-10-14 21:46:13,800 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:46:13,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-14 21:46:13,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2019-10-14 21:46:13,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-14 21:46:13,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2019-10-14 21:46:13,810 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 111 [2019-10-14 21:46:13,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:13,810 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2019-10-14 21:46:13,810 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 21:46:13,810 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2019-10-14 21:46:13,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-14 21:46:13,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:13,812 INFO L380 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:14,016 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:14,016 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:14,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:14,017 INFO L82 PathProgramCache]: Analyzing trace with hash 263871919, now seen corresponding path program 8 times [2019-10-14 21:46:14,017 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:14,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027988363] [2019-10-14 21:46:14,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:14,018 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:14,019 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:14,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2019-10-14 21:46:14,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027988363] [2019-10-14 21:46:14,251 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026407087] [2019-10-14 21:46:14,251 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:14,354 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:46:14,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:14,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-14 21:46:14,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-14 21:46:14,378 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:14,379 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-14 21:46:14,379 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980012647] [2019-10-14 21:46:14,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 21:46:14,379 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:14,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 21:46:14,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:14,380 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 22 states. [2019-10-14 21:46:14,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:14,601 INFO L93 Difference]: Finished difference Result 205 states and 246 transitions. [2019-10-14 21:46:14,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 21:46:14,602 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2019-10-14 21:46:14,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:14,603 INFO L225 Difference]: With dead ends: 205 [2019-10-14 21:46:14,603 INFO L226 Difference]: Without dead ends: 127 [2019-10-14 21:46:14,604 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 21:46:14,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-14 21:46:14,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2019-10-14 21:46:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-14 21:46:14,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2019-10-14 21:46:14,611 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 116 [2019-10-14 21:46:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:14,612 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2019-10-14 21:46:14,612 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 21:46:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2019-10-14 21:46:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-14 21:46:14,613 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:14,613 INFO L380 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:14,817 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:14,817 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:14,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:14,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1047643319, now seen corresponding path program 9 times [2019-10-14 21:46:14,819 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:14,819 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546546931] [2019-10-14 21:46:14,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:14,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:14,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:15,068 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2019-10-14 21:46:15,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546546931] [2019-10-14 21:46:15,068 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031880967] [2019-10-14 21:46:15,068 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:15,147 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 21:46:15,147 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:15,148 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-14 21:46:15,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:15,379 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:46:15,379 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:15,381 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:15,382 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:15,382 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:46:15,407 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:15,489 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 6 proven. 141 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-10-14 21:46:15,489 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:15,490 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 36 [2019-10-14 21:46:15,490 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080579447] [2019-10-14 21:46:15,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 21:46:15,490 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 21:46:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 21:46:15,491 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 36 states. [2019-10-14 21:46:17,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:17,325 INFO L93 Difference]: Finished difference Result 283 states and 348 transitions. [2019-10-14 21:46:17,326 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-14 21:46:17,326 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 121 [2019-10-14 21:46:17,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:17,328 INFO L225 Difference]: With dead ends: 283 [2019-10-14 21:46:17,328 INFO L226 Difference]: Without dead ends: 202 [2019-10-14 21:46:17,330 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1265, Invalid=4897, Unknown=0, NotChecked=0, Total=6162 [2019-10-14 21:46:17,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-14 21:46:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 191. [2019-10-14 21:46:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-10-14 21:46:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 230 transitions. [2019-10-14 21:46:17,344 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 230 transitions. Word has length 121 [2019-10-14 21:46:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:17,344 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 230 transitions. [2019-10-14 21:46:17,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 21:46:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 230 transitions. [2019-10-14 21:46:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-14 21:46:17,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:17,345 INFO L380 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 18, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:17,549 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:17,549 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash -688313295, now seen corresponding path program 4 times [2019-10-14 21:46:17,550 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:17,550 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891616726] [2019-10-14 21:46:17,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:17,551 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:17,551 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:17,798 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-14 21:46:17,798 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891616726] [2019-10-14 21:46:17,801 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163361313] [2019-10-14 21:46:17,801 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:17,887 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:17,887 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:17,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-14 21:46:17,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-10-14 21:46:17,907 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:17,908 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-14 21:46:17,908 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206744397] [2019-10-14 21:46:17,908 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:46:17,908 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:17,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:46:17,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:46:17,909 INFO L87 Difference]: Start difference. First operand 191 states and 230 transitions. Second operand 24 states. [2019-10-14 21:46:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:18,290 INFO L93 Difference]: Finished difference Result 350 states and 434 transitions. [2019-10-14 21:46:18,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 21:46:18,291 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2019-10-14 21:46:18,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:18,293 INFO L225 Difference]: With dead ends: 350 [2019-10-14 21:46:18,293 INFO L226 Difference]: Without dead ends: 204 [2019-10-14 21:46:18,296 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-14 21:46:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-10-14 21:46:18,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2019-10-14 21:46:18,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-14 21:46:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2019-10-14 21:46:18,311 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 126 [2019-10-14 21:46:18,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:18,312 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2019-10-14 21:46:18,312 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 21:46:18,312 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2019-10-14 21:46:18,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 21:46:18,313 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:18,313 INFO L380 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 19, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:18,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:18,517 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:18,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:18,518 INFO L82 PathProgramCache]: Analyzing trace with hash 868455985, now seen corresponding path program 5 times [2019-10-14 21:46:18,518 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:18,518 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781471428] [2019-10-14 21:46:18,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:18,518 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:18,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:18,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:18,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:18,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2019-10-14 21:46:18,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781471428] [2019-10-14 21:46:18,795 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099605638] [2019-10-14 21:46:18,795 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:19,764 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-14 21:46:19,764 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:19,767 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-14 21:46:19,769 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-10-14 21:46:19,808 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:19,808 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-14 21:46:19,808 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747485124] [2019-10-14 21:46:19,809 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 21:46:19,809 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:19,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 21:46:19,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:46:19,810 INFO L87 Difference]: Start difference. First operand 199 states and 240 transitions. Second operand 25 states. [2019-10-14 21:46:19,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:19,977 INFO L93 Difference]: Finished difference Result 364 states and 452 transitions. [2019-10-14 21:46:19,979 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 21:46:19,979 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 131 [2019-10-14 21:46:19,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:19,981 INFO L225 Difference]: With dead ends: 364 [2019-10-14 21:46:19,981 INFO L226 Difference]: Without dead ends: 212 [2019-10-14 21:46:19,982 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-14 21:46:19,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-14 21:46:19,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2019-10-14 21:46:19,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-14 21:46:20,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 250 transitions. [2019-10-14 21:46:20,002 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 250 transitions. Word has length 131 [2019-10-14 21:46:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:20,002 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 250 transitions. [2019-10-14 21:46:20,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 21:46:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 250 transitions. [2019-10-14 21:46:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-14 21:46:20,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:20,004 INFO L380 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 20, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:20,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:20,220 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:20,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:20,220 INFO L82 PathProgramCache]: Analyzing trace with hash -7078731, now seen corresponding path program 6 times [2019-10-14 21:46:20,221 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:20,221 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579885778] [2019-10-14 21:46:20,221 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:20,222 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:20,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2019-10-14 21:46:20,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579885778] [2019-10-14 21:46:20,596 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056302730] [2019-10-14 21:46:20,596 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:21,020 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-14 21:46:21,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:21,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 21:46:21,025 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:21,484 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:21,485 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 22 [2019-10-14 21:46:21,485 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:21,485 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:21,488 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:21,488 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:21,489 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-14 21:46:21,510 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:21,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 56 proven. 168 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2019-10-14 21:46:21,586 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:21,586 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 42 [2019-10-14 21:46:21,586 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637790966] [2019-10-14 21:46:21,587 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 21:46:21,587 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:21,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 21:46:21,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1323, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 21:46:21,588 INFO L87 Difference]: Start difference. First operand 207 states and 250 transitions. Second operand 42 states. [2019-10-14 21:46:26,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:26,651 INFO L93 Difference]: Finished difference Result 406 states and 497 transitions. [2019-10-14 21:46:26,652 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2019-10-14 21:46:26,652 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 136 [2019-10-14 21:46:26,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:26,655 INFO L225 Difference]: With dead ends: 406 [2019-10-14 21:46:26,655 INFO L226 Difference]: Without dead ends: 248 [2019-10-14 21:46:26,660 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7136 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=4503, Invalid=16377, Unknown=0, NotChecked=0, Total=20880 [2019-10-14 21:46:26,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-10-14 21:46:26,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 152. [2019-10-14 21:46:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-14 21:46:26,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2019-10-14 21:46:26,670 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 136 [2019-10-14 21:46:26,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:26,671 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2019-10-14 21:46:26,671 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 21:46:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2019-10-14 21:46:26,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-14 21:46:26,672 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:26,672 INFO L380 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:26,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:26,877 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:26,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:26,877 INFO L82 PathProgramCache]: Analyzing trace with hash -74610458, now seen corresponding path program 10 times [2019-10-14 21:46:26,878 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:26,878 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063947585] [2019-10-14 21:46:26,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,878 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:26,878 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:26,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:27,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:27,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:27,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 6 proven. 715 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2019-10-14 21:46:27,312 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063947585] [2019-10-14 21:46:27,313 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992897124] [2019-10-14 21:46:27,313 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:27,485 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:46:27,486 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:27,488 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:46:27,491 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:27,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2019-10-14 21:46:27,539 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:27,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-14 21:46:27,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651600059] [2019-10-14 21:46:27,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 21:46:27,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:27,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 21:46:27,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:46:27,542 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand 27 states. [2019-10-14 21:46:27,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:27,854 INFO L93 Difference]: Finished difference Result 261 states and 312 transitions. [2019-10-14 21:46:27,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 21:46:27,855 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 149 [2019-10-14 21:46:27,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:27,856 INFO L225 Difference]: With dead ends: 261 [2019-10-14 21:46:27,856 INFO L226 Difference]: Without dead ends: 160 [2019-10-14 21:46:27,857 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-14 21:46:27,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-14 21:46:27,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2019-10-14 21:46:27,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-14 21:46:27,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2019-10-14 21:46:27,868 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 149 [2019-10-14 21:46:27,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:27,869 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2019-10-14 21:46:27,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 21:46:27,869 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2019-10-14 21:46:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-14 21:46:27,870 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:27,870 INFO L380 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:28,074 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:28,074 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:28,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:28,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1658402930, now seen corresponding path program 11 times [2019-10-14 21:46:28,075 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:28,075 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812178714] [2019-10-14 21:46:28,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:28,076 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:28,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:28,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 6 proven. 782 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2019-10-14 21:46:28,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812178714] [2019-10-14 21:46:28,550 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257311238] [2019-10-14 21:46:28,551 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:29,691 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-14 21:46:29,692 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:29,695 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-14 21:46:29,697 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:29,722 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 818 trivial. 0 not checked. [2019-10-14 21:46:29,722 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:29,723 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-14 21:46:29,723 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353092126] [2019-10-14 21:46:29,723 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 21:46:29,724 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:29,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 21:46:29,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:46:29,725 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 28 states. [2019-10-14 21:46:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:29,989 INFO L93 Difference]: Finished difference Result 269 states and 322 transitions. [2019-10-14 21:46:29,990 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 21:46:29,990 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-10-14 21:46:29,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:29,991 INFO L225 Difference]: With dead ends: 269 [2019-10-14 21:46:29,991 INFO L226 Difference]: Without dead ends: 165 [2019-10-14 21:46:29,992 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:46:29,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-14 21:46:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2019-10-14 21:46:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-10-14 21:46:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2019-10-14 21:46:30,003 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 154 [2019-10-14 21:46:30,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:30,003 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2019-10-14 21:46:30,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 21:46:30,003 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2019-10-14 21:46:30,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-14 21:46:30,004 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:30,004 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:30,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:30,210 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:30,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:30,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1479239778, now seen corresponding path program 12 times [2019-10-14 21:46:30,211 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:30,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443648193] [2019-10-14 21:46:30,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:30,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:30,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:30,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 6 proven. 852 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2019-10-14 21:46:30,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443648193] [2019-10-14 21:46:30,644 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002047992] [2019-10-14 21:46:30,644 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:31,600 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-10-14 21:46:31,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:46:31,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-14 21:46:31,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:31,953 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-10-14 21:46:31,954 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:46:31,956 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:46:31,957 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:46:31,957 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-14 21:46:31,995 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:46:32,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 11 proven. 261 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2019-10-14 21:46:32,195 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:32,195 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18] total 44 [2019-10-14 21:46:32,195 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799370193] [2019-10-14 21:46:32,196 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-14 21:46:32,196 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:32,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-14 21:46:32,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1398, Unknown=0, NotChecked=0, Total=1892 [2019-10-14 21:46:32,197 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand 44 states. [2019-10-14 21:46:34,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:34,896 INFO L93 Difference]: Finished difference Result 366 states and 449 transitions. [2019-10-14 21:46:34,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-14 21:46:34,896 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 159 [2019-10-14 21:46:34,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:34,898 INFO L225 Difference]: With dead ends: 366 [2019-10-14 21:46:34,899 INFO L226 Difference]: Without dead ends: 259 [2019-10-14 21:46:34,902 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2022, Invalid=7484, Unknown=0, NotChecked=0, Total=9506 [2019-10-14 21:46:34,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-10-14 21:46:34,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2019-10-14 21:46:34,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-10-14 21:46:34,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 299 transitions. [2019-10-14 21:46:34,920 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 299 transitions. Word has length 159 [2019-10-14 21:46:34,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:34,920 INFO L462 AbstractCegarLoop]: Abstraction has 248 states and 299 transitions. [2019-10-14 21:46:34,920 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-14 21:46:34,920 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 299 transitions. [2019-10-14 21:46:34,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-14 21:46:34,922 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:34,922 INFO L380 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:46:35,127 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:35,128 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:46:35,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:46:35,128 INFO L82 PathProgramCache]: Analyzing trace with hash 895048948, now seen corresponding path program 7 times [2019-10-14 21:46:35,129 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:46:35,129 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500494742] [2019-10-14 21:46:35,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:35,129 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:46:35,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:46:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:35,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1586 backedges. 6 proven. 925 refuted. 0 times theorem prover too weak. 655 trivial. 0 not checked. [2019-10-14 21:46:35,501 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500494742] [2019-10-14 21:46:35,502 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865736612] [2019-10-14 21:46:35,502 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:46:35,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:46:35,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-14 21:46:35,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:46:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1586 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2019-10-14 21:46:35,659 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:46:35,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-10-14 21:46:35,659 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435477555] [2019-10-14 21:46:35,659 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 21:46:35,659 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:46:35,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 21:46:35,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:46:35,660 INFO L87 Difference]: Start difference. First operand 248 states and 299 transitions. Second operand 30 states. [2019-10-14 21:46:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:46:35,915 INFO L93 Difference]: Finished difference Result 452 states and 560 transitions. [2019-10-14 21:46:35,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 21:46:35,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 164 [2019-10-14 21:46:35,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:46:35,918 INFO L225 Difference]: With dead ends: 452 [2019-10-14 21:46:35,918 INFO L226 Difference]: Without dead ends: 261 [2019-10-14 21:46:35,920 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-10-14 21:46:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-10-14 21:46:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 256. [2019-10-14 21:46:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-10-14 21:46:35,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 309 transitions. [2019-10-14 21:46:35,948 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 309 transitions. Word has length 164 [2019-10-14 21:46:35,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:46:35,948 INFO L462 AbstractCegarLoop]: Abstraction has 256 states and 309 transitions. [2019-10-14 21:46:35,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 21:46:35,949 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 309 transitions. [2019-10-14 21:46:35,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-10-14 21:46:35,951 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:46:35,951 INFO L380 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 25, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]