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-f4eb214f-m [2019-10-13 17:46:55,444 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 17:46:55,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 17:46:55,469 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 17:46:55,469 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 17:46:55,471 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 17:46:55,474 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 17:46:55,477 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 17:46:55,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 17:46:55,485 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 17:46:55,486 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 17:46:55,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 17:46:55,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 17:46:55,488 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 17:46:55,491 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 17:46:55,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 17:46:55,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 17:46:55,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 17:46:55,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 17:46:55,504 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 17:46:55,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 17:46:55,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 17:46:55,509 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 17:46:55,510 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 17:46:55,513 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 17:46:55,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 17:46:55,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 17:46:55,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 17:46:55,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 17:46:55,525 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 17:46:55,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 17:46:55,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 17:46:55,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 17:46:55,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 17:46:55,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 17:46:55,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 17:46:55,533 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-13 17:46:55,554 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 17:46:55,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 17:46:55,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 17:46:55,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 17:46:55,557 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 17:46:55,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 17:46:55,557 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 17:46:55,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 17:46:55,558 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 17:46:55,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 17:46:55,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 17:46:55,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 17:46:55,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 17:46:55,560 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 17:46:55,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 17:46:55,560 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 17:46:55,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 17:46:55,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 17:46:55,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 17:46:55,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 17:46:55,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 17:46:55,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:46:55,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 17:46:55,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 17:46:55,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 17:46:55,562 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 17:46:55,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 17:46:55,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 17:46:55,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 17:46:55,840 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 17:46:55,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 17:46:55,857 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 17:46:55,858 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 17:46:55,859 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 17:46:55,860 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-10-13 17:46:55,950 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/574f506cc/b02a755cca7c4a1e8aa406dd994500b7/FLAG176c2f61b [2019-10-13 17:46:56,454 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 17:46:56,455 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2019-10-13 17:46:56,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/574f506cc/b02a755cca7c4a1e8aa406dd994500b7/FLAG176c2f61b [2019-10-13 17:46:56,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/574f506cc/b02a755cca7c4a1e8aa406dd994500b7 [2019-10-13 17:46:56,875 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 17:46:56,876 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 17:46:56,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 17:46:56,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 17:46:56,881 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 17:46:56,882 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:46:56" (1/1) ... [2019-10-13 17:46:56,885 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5627da55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:56, skipping insertion in model container [2019-10-13 17:46:56,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:46:56" (1/1) ... [2019-10-13 17:46:56,893 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 17:46:56,911 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 17:46:57,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:46:57,096 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 17:46:57,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 17:46:57,134 INFO L192 MainTranslator]: Completed translation [2019-10-13 17:46:57,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57 WrapperNode [2019-10-13 17:46:57,134 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 17:46:57,135 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 17:46:57,135 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 17:46:57,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 17:46:57,227 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... [2019-10-13 17:46:57,227 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... [2019-10-13 17:46:57,234 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... [2019-10-13 17:46:57,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... [2019-10-13 17:46:57,241 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... [2019-10-13 17:46:57,251 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... [2019-10-13 17:46:57,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... [2019-10-13 17:46:57,260 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 17:46:57,261 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 17:46:57,261 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 17:46:57,262 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 17:46:57,263 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 17:46:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 17:46:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 17:46:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 17:46:57,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 17:46:57,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 17:46:57,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 17:46:57,568 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 17:46:57,570 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 17:46:57,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:46:57 BoogieIcfgContainer [2019-10-13 17:46:57,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 17:46:57,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 17:46:57,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 17:46:57,587 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 17:46:57,587 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:46:56" (1/3) ... [2019-10-13 17:46:57,588 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428f8a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:46:57, skipping insertion in model container [2019-10-13 17:46:57,588 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:46:57" (2/3) ... [2019-10-13 17:46:57,589 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@428f8a15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:46:57, skipping insertion in model container [2019-10-13 17:46:57,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:46:57" (3/3) ... [2019-10-13 17:46:57,591 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2019-10-13 17:46:57,618 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 17:46:57,625 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 17:46:57,647 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 17:46:57,667 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 17:46:57,668 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 17:46:57,668 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 17:46:57,668 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 17:46:57,668 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 17:46:57,668 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 17:46:57,668 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 17:46:57,668 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 17:46:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2019-10-13 17:46:57,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:46:57,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:57,692 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:57,694 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:57,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:57,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1241254978, now seen corresponding path program 1 times [2019-10-13 17:46:57,706 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:57,706 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510475134] [2019-10-13 17:46:57,706 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:57,707 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:57,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:46:57,877 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510475134] [2019-10-13 17:46:57,878 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:57,878 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 17:46:57,879 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272304216] [2019-10-13 17:46:57,883 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 17:46:57,884 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:57,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 17:46:57,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:46:57,899 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 3 states. [2019-10-13 17:46:58,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:58,016 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2019-10-13 17:46:58,017 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 17:46:58,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-13 17:46:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:58,027 INFO L225 Difference]: With dead ends: 48 [2019-10-13 17:46:58,027 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 17:46:58,030 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 17:46:58,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 17:46:58,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 17:46:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 17:46:58,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2019-10-13 17:46:58,068 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2019-10-13 17:46:58,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:58,069 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2019-10-13 17:46:58,069 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 17:46:58,069 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2019-10-13 17:46:58,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 17:46:58,070 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:58,071 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:58,071 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:58,072 INFO L82 PathProgramCache]: Analyzing trace with hash -159068691, now seen corresponding path program 1 times [2019-10-13 17:46:58,072 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:58,072 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-13 17:46:58,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,073 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 17:46:58,168 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311574396] [2019-10-13 17:46:58,168 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 17:46:58,169 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 17:46:58,169 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924189347] [2019-10-13 17:46:58,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 17:46:58,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:58,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 17:46:58,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:58,173 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 4 states. [2019-10-13 17:46:58,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:58,279 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-13 17:46:58,279 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 17:46:58,279 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-10-13 17:46:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:58,281 INFO L225 Difference]: With dead ends: 43 [2019-10-13 17:46:58,281 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 17:46:58,282 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-13 17:46:58,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 17:46:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2019-10-13 17:46:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 17:46:58,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-10-13 17:46:58,291 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 15 [2019-10-13 17:46:58,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:58,291 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-10-13 17:46:58,291 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 17:46:58,292 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-10-13 17:46:58,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 17:46:58,293 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:58,293 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 17:46:58,293 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:58,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:58,294 INFO L82 PathProgramCache]: Analyzing trace with hash 99818017, now seen corresponding path program 1 times [2019-10-13 17:46:58,294 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:58,294 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624523925] [2019-10-13 17:46:58,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,295 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,408 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:58,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624523925] [2019-10-13 17:46:58,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058006162] [2019-10-13 17:46:58,410 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 17:46:58,474 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 17:46:58,510 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:58,510 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-10-13 17:46:58,510 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579182265] [2019-10-13 17:46:58,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 17:46:58,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:58,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 17:46:58,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-13 17:46:58,514 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-10-13 17:46:58,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:58,659 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2019-10-13 17:46:58,660 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 17:46:58,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2019-10-13 17:46:58,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:58,661 INFO L225 Difference]: With dead ends: 49 [2019-10-13 17:46:58,661 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 17:46:58,662 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 [2019-10-13 17:46:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 17:46:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2019-10-13 17:46:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 17:46:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2019-10-13 17:46:58,669 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2019-10-13 17:46:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:58,670 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2019-10-13 17:46:58,670 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 17:46:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2019-10-13 17:46:58,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 17:46:58,671 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:58,671 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] [2019-10-13 17:46:58,876 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:58,885 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:58,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:58,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1510721175, now seen corresponding path program 2 times [2019-10-13 17:46:58,886 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:58,886 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172591585] [2019-10-13 17:46:58,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,887 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:58,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:58,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:58,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172591585] [2019-10-13 17:46:58,985 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263893551] [2019-10-13 17:46:58,985 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 [2019-10-13 17:46:59,047 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:46:59,047 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:59,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 17:46:59,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-13 17:46:59,065 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:59,065 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-10-13 17:46:59,065 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789555517] [2019-10-13 17:46:59,066 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 17:46:59,066 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:59,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 17:46:59,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-10-13 17:46:59,067 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 7 states. [2019-10-13 17:46:59,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:46:59,179 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2019-10-13 17:46:59,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 17:46:59,179 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2019-10-13 17:46:59,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:46:59,181 INFO L225 Difference]: With dead ends: 57 [2019-10-13 17:46:59,181 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 17:46:59,181 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 [2019-10-13 17:46:59,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 17:46:59,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2019-10-13 17:46:59,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 17:46:59,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2019-10-13 17:46:59,189 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 25 [2019-10-13 17:46:59,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:46:59,189 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2019-10-13 17:46:59,189 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 17:46:59,189 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2019-10-13 17:46:59,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 17:46:59,190 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:46:59,191 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] [2019-10-13 17:46:59,394 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:46:59,394 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:46:59,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:46:59,395 INFO L82 PathProgramCache]: Analyzing trace with hash -235287899, now seen corresponding path program 3 times [2019-10-13 17:46:59,395 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:46:59,395 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289032752] [2019-10-13 17:46:59,395 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:59,396 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:46:59,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:46:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:46:59,506 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-13 17:46:59,507 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289032752] [2019-10-13 17:46:59,509 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007652640] [2019-10-13 17:46:59,510 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 [2019-10-13 17:46:59,570 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:46:59,570 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:46:59,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:46:59,575 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:46:59,684 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 [2019-10-13 17:46:59,686 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:46:59,690 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:46:59,690 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:46:59,690 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:46:59,707 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:46:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-13 17:46:59,739 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:46:59,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2019-10-13 17:46:59,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023942615] [2019-10-13 17:46:59,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:46:59,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:46:59,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:46:59,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:46:59,741 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 15 states. [2019-10-13 17:47:00,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:00,232 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2019-10-13 17:47:00,233 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:47:00,233 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2019-10-13 17:47:00,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:00,239 INFO L225 Difference]: With dead ends: 88 [2019-10-13 17:47:00,239 INFO L226 Difference]: Without dead ends: 66 [2019-10-13 17:47:00,241 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 [2019-10-13 17:47:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-10-13 17:47:00,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2019-10-13 17:47:00,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-10-13 17:47:00,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2019-10-13 17:47:00,275 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 30 [2019-10-13 17:47:00,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:00,275 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2019-10-13 17:47:00,275 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:47:00,276 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2019-10-13 17:47:00,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 17:47:00,277 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:00,277 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] [2019-10-13 17:47:00,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:00,482 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:00,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:00,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1110475037, now seen corresponding path program 1 times [2019-10-13 17:47:00,484 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:00,484 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357641850] [2019-10-13 17:47:00,484 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:00,485 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:00,485 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:00,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:00,620 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:47:00,620 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357641850] [2019-10-13 17:47:00,621 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842908700] [2019-10-13 17:47:00,621 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:00,693 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-13 17:47:00,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:00,733 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2019-10-13 17:47:00,733 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:00,734 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-10-13 17:47:00,734 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002619480] [2019-10-13 17:47:00,738 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 17:47:00,739 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 17:47:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-10-13 17:47:00,740 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 9 states. [2019-10-13 17:47:00,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:00,859 INFO L93 Difference]: Finished difference Result 108 states and 132 transitions. [2019-10-13 17:47:00,859 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 17:47:00,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2019-10-13 17:47:00,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:00,862 INFO L225 Difference]: With dead ends: 108 [2019-10-13 17:47:00,863 INFO L226 Difference]: Without dead ends: 68 [2019-10-13 17:47:00,864 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 [2019-10-13 17:47:00,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-13 17:47:00,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2019-10-13 17:47:00,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-10-13 17:47:00,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 74 transitions. [2019-10-13 17:47:00,873 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 74 transitions. Word has length 35 [2019-10-13 17:47:00,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:00,874 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 74 transitions. [2019-10-13 17:47:00,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 17:47:00,874 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 74 transitions. [2019-10-13 17:47:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 17:47:00,875 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:00,875 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] [2019-10-13 17:47:01,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,080 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:01,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:01,081 INFO L82 PathProgramCache]: Analyzing trace with hash -194968281, now seen corresponding path program 2 times [2019-10-13 17:47:01,081 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:01,082 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729554208] [2019-10-13 17:47:01,082 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,083 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,083 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:01,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:01,188 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:01,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729554208] [2019-10-13 17:47:01,189 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254451720] [2019-10-13 17:47:01,189 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,239 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:01,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:01,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-13 17:47:01,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:01,264 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2019-10-13 17:47:01,264 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:01,265 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-10-13 17:47:01,265 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85692207] [2019-10-13 17:47:01,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 17:47:01,266 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:01,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 17:47:01,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-10-13 17:47:01,266 INFO L87 Difference]: Start difference. First operand 63 states and 74 transitions. Second operand 10 states. [2019-10-13 17:47:01,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:01,392 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2019-10-13 17:47:01,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 17:47:01,392 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2019-10-13 17:47:01,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:01,394 INFO L225 Difference]: With dead ends: 122 [2019-10-13 17:47:01,394 INFO L226 Difference]: Without dead ends: 76 [2019-10-13 17:47:01,394 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 [2019-10-13 17:47:01,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-10-13 17:47:01,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2019-10-13 17:47:01,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:47:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2019-10-13 17:47:01,404 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 40 [2019-10-13 17:47:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:01,404 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2019-10-13 17:47:01,404 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 17:47:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2019-10-13 17:47:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 17:47:01,406 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:01,406 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] [2019-10-13 17:47:01,609 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,610 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:01,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:01,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1343481249, now seen corresponding path program 3 times [2019-10-13 17:47:01,611 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:01,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024287009] [2019-10-13 17:47:01,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:01,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:01,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-10-13 17:47:01,713 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024287009] [2019-10-13 17:47:01,715 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565174300] [2019-10-13 17:47:01,715 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:01,768 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 17:47:01,768 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:01,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:47:01,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:01,976 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:01,977 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 [2019-10-13 17:47:01,978 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:01,979 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:01,985 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:01,985 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:01,986 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-13 17:47:02,001 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:02,040 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2019-10-13 17:47:02,041 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:02,041 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-10-13 17:47:02,041 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509996821] [2019-10-13 17:47:02,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:47:02,042 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:02,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:47:02,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:47:02,043 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand 20 states. [2019-10-13 17:47:03,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:03,332 INFO L93 Difference]: Finished difference Result 148 states and 182 transitions. [2019-10-13 17:47:03,332 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-10-13 17:47:03,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 45 [2019-10-13 17:47:03,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:03,334 INFO L225 Difference]: With dead ends: 148 [2019-10-13 17:47:03,334 INFO L226 Difference]: Without dead ends: 96 [2019-10-13 17:47:03,337 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 [2019-10-13 17:47:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-10-13 17:47:03,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 61. [2019-10-13 17:47:03,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-10-13 17:47:03,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2019-10-13 17:47:03,346 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 45 [2019-10-13 17:47:03,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:03,347 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2019-10-13 17:47:03,347 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:47:03,347 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2019-10-13 17:47:03,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-13 17:47:03,348 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:03,348 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] [2019-10-13 17:47:03,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:03,560 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:03,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:03,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1086899484, now seen corresponding path program 1 times [2019-10-13 17:47:03,561 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:03,562 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545171670] [2019-10-13 17:47:03,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:03,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-10-13 17:47:03,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545171670] [2019-10-13 17:47:03,711 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95632688] [2019-10-13 17:47:03,712 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 [2019-10-13 17:47:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:03,769 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 17:47:03,782 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:03,821 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-10-13 17:47:03,822 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:03,822 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-10-13 17:47:03,823 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149277501] [2019-10-13 17:47:03,823 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 17:47:03,823 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:03,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 17:47:03,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-10-13 17:47:03,824 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand 12 states. [2019-10-13 17:47:03,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:03,960 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2019-10-13 17:47:03,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 17:47:03,960 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-10-13 17:47:03,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:03,962 INFO L225 Difference]: With dead ends: 109 [2019-10-13 17:47:03,962 INFO L226 Difference]: Without dead ends: 69 [2019-10-13 17:47:03,963 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 [2019-10-13 17:47:03,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-13 17:47:03,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-10-13 17:47:03,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-13 17:47:03,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2019-10-13 17:47:03,972 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 58 [2019-10-13 17:47:03,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:03,973 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2019-10-13 17:47:03,973 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 17:47:03,973 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2019-10-13 17:47:03,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-13 17:47:03,974 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:03,974 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] [2019-10-13 17:47:04,178 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:04,179 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:04,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:04,180 INFO L82 PathProgramCache]: Analyzing trace with hash -957205740, now seen corresponding path program 2 times [2019-10-13 17:47:04,180 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:04,181 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2449065] [2019-10-13 17:47:04,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,181 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,182 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:04,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2019-10-13 17:47:04,336 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2449065] [2019-10-13 17:47:04,337 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119563735] [2019-10-13 17:47:04,337 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 [2019-10-13 17:47:04,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:04,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:04,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-13 17:47:04,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:04,420 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-10-13 17:47:04,420 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:04,420 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-10-13 17:47:04,420 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006193194] [2019-10-13 17:47:04,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 17:47:04,424 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:04,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 17:47:04,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-13 17:47:04,424 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand 13 states. [2019-10-13 17:47:04,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:04,627 INFO L93 Difference]: Finished difference Result 117 states and 140 transitions. [2019-10-13 17:47:04,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 17:47:04,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 63 [2019-10-13 17:47:04,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:04,632 INFO L225 Difference]: With dead ends: 117 [2019-10-13 17:47:04,632 INFO L226 Difference]: Without dead ends: 74 [2019-10-13 17:47:04,633 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 [2019-10-13 17:47:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-13 17:47:04,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2019-10-13 17:47:04,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-13 17:47:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 82 transitions. [2019-10-13 17:47:04,655 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 82 transitions. Word has length 63 [2019-10-13 17:47:04,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:04,655 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 82 transitions. [2019-10-13 17:47:04,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 17:47:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 82 transitions. [2019-10-13 17:47:04,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-10-13 17:47:04,657 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:04,657 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] [2019-10-13 17:47:04,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:04,861 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:04,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:04,862 INFO L82 PathProgramCache]: Analyzing trace with hash 995106664, now seen corresponding path program 3 times [2019-10-13 17:47:04,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:04,862 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113461975] [2019-10-13 17:47:04,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,862 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:04,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:05,029 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 2 proven. 81 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2019-10-13 17:47:05,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113461975] [2019-10-13 17:47:05,030 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214309676] [2019-10-13 17:47:05,030 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 [2019-10-13 17:47:05,091 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:47:05,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:05,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:47:05,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:05,256 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 [2019-10-13 17:47:05,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:05,258 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:05,259 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:05,259 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:47:05,274 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 1 proven. 43 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2019-10-13 17:47:05,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:05,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-10-13 17:47:05,315 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486984069] [2019-10-13 17:47:05,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:47:05,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:05,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:47:05,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=480, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:47:05,316 INFO L87 Difference]: Start difference. First operand 71 states and 82 transitions. Second operand 25 states. [2019-10-13 17:47:06,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,325 INFO L93 Difference]: Finished difference Result 167 states and 205 transitions. [2019-10-13 17:47:06,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 17:47:06,325 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 68 [2019-10-13 17:47:06,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,326 INFO L225 Difference]: With dead ends: 167 [2019-10-13 17:47:06,326 INFO L226 Difference]: Without dead ends: 121 [2019-10-13 17:47:06,328 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 [2019-10-13 17:47:06,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-10-13 17:47:06,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 110. [2019-10-13 17:47:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-13 17:47:06,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 131 transitions. [2019-10-13 17:47:06,340 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 131 transitions. Word has length 68 [2019-10-13 17:47:06,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,341 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 131 transitions. [2019-10-13 17:47:06,341 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:47:06,341 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 131 transitions. [2019-10-13 17:47:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-10-13 17:47:06,343 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,343 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] [2019-10-13 17:47:06,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:06,547 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1767766386, now seen corresponding path program 1 times [2019-10-13 17:47:06,549 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:06,549 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686105199] [2019-10-13 17:47:06,549 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,550 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:06,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:06,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,680 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 2 proven. 100 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2019-10-13 17:47:06,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686105199] [2019-10-13 17:47:06,681 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400761396] [2019-10-13 17:47:06,681 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 [2019-10-13 17:47:06,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:06,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-13 17:47:06,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:06,765 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2019-10-13 17:47:06,765 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:06,765 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-10-13 17:47:06,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061788991] [2019-10-13 17:47:06,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 17:47:06,766 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:06,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 17:47:06,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-13 17:47:06,767 INFO L87 Difference]: Start difference. First operand 110 states and 131 transitions. Second operand 15 states. [2019-10-13 17:47:06,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:06,918 INFO L93 Difference]: Finished difference Result 206 states and 254 transitions. [2019-10-13 17:47:06,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 17:47:06,919 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2019-10-13 17:47:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:06,920 INFO L225 Difference]: With dead ends: 206 [2019-10-13 17:47:06,920 INFO L226 Difference]: Without dead ends: 123 [2019-10-13 17:47:06,921 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 [2019-10-13 17:47:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-10-13 17:47:06,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 118. [2019-10-13 17:47:06,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-10-13 17:47:06,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 141 transitions. [2019-10-13 17:47:06,936 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 141 transitions. Word has length 73 [2019-10-13 17:47:06,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:06,937 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 141 transitions. [2019-10-13 17:47:06,937 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 17:47:06,937 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 141 transitions. [2019-10-13 17:47:06,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-10-13 17:47:06,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:06,943 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] [2019-10-13 17:47:07,143 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,144 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1854631914, now seen corresponding path program 2 times [2019-10-13 17:47:07,145 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,145 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113683553] [2019-10-13 17:47:07,145 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,146 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,146 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:07,294 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 2 proven. 121 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2019-10-13 17:47:07,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113683553] [2019-10-13 17:47:07,295 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337422152] [2019-10-13 17:47:07,295 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,360 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:07,360 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:07,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-13 17:47:07,369 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:07,398 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2019-10-13 17:47:07,398 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:07,398 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-10-13 17:47:07,398 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433840917] [2019-10-13 17:47:07,399 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 17:47:07,399 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:07,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 17:47:07,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-10-13 17:47:07,400 INFO L87 Difference]: Start difference. First operand 118 states and 141 transitions. Second operand 16 states. [2019-10-13 17:47:07,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:07,611 INFO L93 Difference]: Finished difference Result 220 states and 272 transitions. [2019-10-13 17:47:07,611 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 17:47:07,611 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-10-13 17:47:07,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:07,613 INFO L225 Difference]: With dead ends: 220 [2019-10-13 17:47:07,613 INFO L226 Difference]: Without dead ends: 131 [2019-10-13 17:47:07,616 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 [2019-10-13 17:47:07,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-10-13 17:47:07,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2019-10-13 17:47:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-10-13 17:47:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 151 transitions. [2019-10-13 17:47:07,664 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 151 transitions. Word has length 78 [2019-10-13 17:47:07,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:07,665 INFO L462 AbstractCegarLoop]: Abstraction has 126 states and 151 transitions. [2019-10-13 17:47:07,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 17:47:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 151 transitions. [2019-10-13 17:47:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-10-13 17:47:07,668 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:07,668 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] [2019-10-13 17:47:07,872 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:07,872 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:07,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:07,873 INFO L82 PathProgramCache]: Analyzing trace with hash -2005840374, now seen corresponding path program 3 times [2019-10-13 17:47:07,873 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:07,873 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888819967] [2019-10-13 17:47:07,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,873 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:07,873 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:08,035 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2019-10-13 17:47:08,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888819967] [2019-10-13 17:47:08,035 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633009742] [2019-10-13 17:47:08,036 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:08,096 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 17:47:08,096 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:08,097 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 17:47:08,101 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:08,434 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:08,435 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 [2019-10-13 17:47:08,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:08,437 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:08,441 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:08,442 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:08,443 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-13 17:47:08,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:08,530 INFO L134 CoverageAnalysis]: Checked inductivity of 358 backedges. 29 proven. 59 refuted. 0 times theorem prover too weak. 270 trivial. 0 not checked. [2019-10-13 17:47:08,531 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:08,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2019-10-13 17:47:08,531 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221424288] [2019-10-13 17:47:08,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 17:47:08,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:08,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 17:47:08,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2019-10-13 17:47:08,534 INFO L87 Difference]: Start difference. First operand 126 states and 151 transitions. Second operand 31 states. [2019-10-13 17:47:11,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:11,354 INFO L93 Difference]: Finished difference Result 258 states and 314 transitions. [2019-10-13 17:47:11,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2019-10-13 17:47:11,354 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 83 [2019-10-13 17:47:11,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:11,356 INFO L225 Difference]: With dead ends: 258 [2019-10-13 17:47:11,356 INFO L226 Difference]: Without dead ends: 163 [2019-10-13 17:47:11,361 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2694 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1734, Invalid=7008, Unknown=0, NotChecked=0, Total=8742 [2019-10-13 17:47:11,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-10-13 17:47:11,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 99. [2019-10-13 17:47:11,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2019-10-13 17:47:11,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 114 transitions. [2019-10-13 17:47:11,371 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 114 transitions. Word has length 83 [2019-10-13 17:47:11,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:11,371 INFO L462 AbstractCegarLoop]: Abstraction has 99 states and 114 transitions. [2019-10-13 17:47:11,372 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 17:47:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 114 transitions. [2019-10-13 17:47:11,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-13 17:47:11,373 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:11,373 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] [2019-10-13 17:47:11,577 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:11,577 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash 343721127, now seen corresponding path program 4 times [2019-10-13 17:47:11,578 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:11,579 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171030870] [2019-10-13 17:47:11,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,579 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:11,580 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:11,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 4 proven. 169 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2019-10-13 17:47:11,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171030870] [2019-10-13 17:47:11,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620258524] [2019-10-13 17:47:11,761 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:11,839 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:11,840 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:11,841 INFO L256 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 17:47:11,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:11,860 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 263 trivial. 0 not checked. [2019-10-13 17:47:11,860 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:11,860 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-10-13 17:47:11,860 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224674836] [2019-10-13 17:47:11,861 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 17:47:11,861 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:11,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 17:47:11,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-10-13 17:47:11,862 INFO L87 Difference]: Start difference. First operand 99 states and 114 transitions. Second operand 18 states. [2019-10-13 17:47:12,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:12,067 INFO L93 Difference]: Finished difference Result 173 states and 206 transitions. [2019-10-13 17:47:12,067 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 17:47:12,067 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2019-10-13 17:47:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:12,069 INFO L225 Difference]: With dead ends: 173 [2019-10-13 17:47:12,069 INFO L226 Difference]: Without dead ends: 107 [2019-10-13 17:47:12,070 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 [2019-10-13 17:47:12,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-10-13 17:47:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 104. [2019-10-13 17:47:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-13 17:47:12,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 120 transitions. [2019-10-13 17:47:12,078 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 120 transitions. Word has length 96 [2019-10-13 17:47:12,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:12,078 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 120 transitions. [2019-10-13 17:47:12,078 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 17:47:12,078 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 120 transitions. [2019-10-13 17:47:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-10-13 17:47:12,080 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:12,080 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] [2019-10-13 17:47:12,285 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:12,286 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1246669377, now seen corresponding path program 5 times [2019-10-13 17:47:12,286 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:12,286 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518142856] [2019-10-13 17:47:12,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,287 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:12,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:12,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:12,471 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 4 proven. 196 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2019-10-13 17:47:12,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518142856] [2019-10-13 17:47:12,472 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581182458] [2019-10-13 17:47:12,472 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:12,719 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2019-10-13 17:47:12,719 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:12,721 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2019-10-13 17:47:12,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 303 trivial. 0 not checked. [2019-10-13 17:47:12,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:12,742 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-10-13 17:47:12,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170444891] [2019-10-13 17:47:12,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 17:47:12,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:12,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 17:47:12,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-10-13 17:47:12,744 INFO L87 Difference]: Start difference. First operand 104 states and 120 transitions. Second operand 19 states. [2019-10-13 17:47:12,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:12,924 INFO L93 Difference]: Finished difference Result 181 states and 216 transitions. [2019-10-13 17:47:12,924 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 17:47:12,924 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 101 [2019-10-13 17:47:12,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:12,926 INFO L225 Difference]: With dead ends: 181 [2019-10-13 17:47:12,926 INFO L226 Difference]: Without dead ends: 112 [2019-10-13 17:47:12,927 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 [2019-10-13 17:47:12,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-10-13 17:47:12,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2019-10-13 17:47:12,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-10-13 17:47:12,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 126 transitions. [2019-10-13 17:47:12,935 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 126 transitions. Word has length 101 [2019-10-13 17:47:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:12,936 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 126 transitions. [2019-10-13 17:47:12,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 17:47:12,936 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 126 transitions. [2019-10-13 17:47:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-10-13 17:47:12,937 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:12,937 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] [2019-10-13 17:47:13,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,143 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:13,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:13,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1730536149, now seen corresponding path program 6 times [2019-10-13 17:47:13,144 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:13,144 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137483408] [2019-10-13 17:47:13,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,144 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:13,144 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 4 proven. 225 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2019-10-13 17:47:13,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137483408] [2019-10-13 17:47:13,330 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833625595] [2019-10-13 17:47:13,330 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:13,644 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-13 17:47:13,645 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:13,647 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 17:47:13,650 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:13,685 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2019-10-13 17:47:13,685 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:13,685 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-10-13 17:47:13,686 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042653401] [2019-10-13 17:47:13,695 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 17:47:13,695 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:13,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 17:47:13,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-10-13 17:47:13,698 INFO L87 Difference]: Start difference. First operand 109 states and 126 transitions. Second operand 20 states. [2019-10-13 17:47:13,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:13,878 INFO L93 Difference]: Finished difference Result 189 states and 226 transitions. [2019-10-13 17:47:13,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 17:47:13,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 106 [2019-10-13 17:47:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:13,880 INFO L225 Difference]: With dead ends: 189 [2019-10-13 17:47:13,880 INFO L226 Difference]: Without dead ends: 117 [2019-10-13 17:47:13,881 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 [2019-10-13 17:47:13,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2019-10-13 17:47:13,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 114. [2019-10-13 17:47:13,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-10-13 17:47:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 132 transitions. [2019-10-13 17:47:13,888 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 132 transitions. Word has length 106 [2019-10-13 17:47:13,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:13,888 INFO L462 AbstractCegarLoop]: Abstraction has 114 states and 132 transitions. [2019-10-13 17:47:13,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 17:47:13,889 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 132 transitions. [2019-10-13 17:47:13,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2019-10-13 17:47:13,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:13,890 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] [2019-10-13 17:47:14,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:14,093 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:14,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:14,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1419636421, now seen corresponding path program 7 times [2019-10-13 17:47:14,094 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:14,094 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227041725] [2019-10-13 17:47:14,094 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,095 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,095 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:14,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,334 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 4 proven. 256 refuted. 0 times theorem prover too weak. 388 trivial. 0 not checked. [2019-10-13 17:47:14,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227041725] [2019-10-13 17:47:14,334 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731663836] [2019-10-13 17:47:14,334 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:14,402 INFO L256 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-13 17:47:14,404 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-10-13 17:47:14,422 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:14,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-10-13 17:47:14,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843714269] [2019-10-13 17:47:14,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 17:47:14,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:14,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 17:47:14,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-13 17:47:14,424 INFO L87 Difference]: Start difference. First operand 114 states and 132 transitions. Second operand 21 states. [2019-10-13 17:47:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:14,678 INFO L93 Difference]: Finished difference Result 197 states and 236 transitions. [2019-10-13 17:47:14,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 17:47:14,678 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 111 [2019-10-13 17:47:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:14,679 INFO L225 Difference]: With dead ends: 197 [2019-10-13 17:47:14,680 INFO L226 Difference]: Without dead ends: 122 [2019-10-13 17:47:14,680 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 [2019-10-13 17:47:14,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2019-10-13 17:47:14,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2019-10-13 17:47:14,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2019-10-13 17:47:14,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 138 transitions. [2019-10-13 17:47:14,689 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 138 transitions. Word has length 111 [2019-10-13 17:47:14,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:14,689 INFO L462 AbstractCegarLoop]: Abstraction has 119 states and 138 transitions. [2019-10-13 17:47:14,689 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 17:47:14,689 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 138 transitions. [2019-10-13 17:47:14,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-13 17:47:14,691 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:14,691 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] [2019-10-13 17:47:14,895 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:14,896 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash 263871919, now seen corresponding path program 8 times [2019-10-13 17:47:14,896 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:14,896 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815493329] [2019-10-13 17:47:14,896 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,897 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:14,897 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:15,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:15,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 4 proven. 289 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2019-10-13 17:47:15,169 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815493329] [2019-10-13 17:47:15,170 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623786347] [2019-10-13 17:47:15,170 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:15,290 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 17:47:15,290 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:15,291 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 17:47:15,294 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:15,326 INFO L134 CoverageAnalysis]: Checked inductivity of 730 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 441 trivial. 0 not checked. [2019-10-13 17:47:15,326 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:15,327 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-10-13 17:47:15,327 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486194859] [2019-10-13 17:47:15,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 17:47:15,327 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:15,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 17:47:15,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:15,328 INFO L87 Difference]: Start difference. First operand 119 states and 138 transitions. Second operand 22 states. [2019-10-13 17:47:15,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:15,574 INFO L93 Difference]: Finished difference Result 205 states and 246 transitions. [2019-10-13 17:47:15,574 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 17:47:15,574 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2019-10-13 17:47:15,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:15,576 INFO L225 Difference]: With dead ends: 205 [2019-10-13 17:47:15,576 INFO L226 Difference]: Without dead ends: 127 [2019-10-13 17:47:15,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-13 17:47:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-10-13 17:47:15,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 124. [2019-10-13 17:47:15,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-10-13 17:47:15,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 144 transitions. [2019-10-13 17:47:15,584 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 144 transitions. Word has length 116 [2019-10-13 17:47:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:15,584 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 144 transitions. [2019-10-13 17:47:15,584 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 17:47:15,584 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 144 transitions. [2019-10-13 17:47:15,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-10-13 17:47:15,585 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:15,586 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] [2019-10-13 17:47:15,790 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:15,791 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1047643319, now seen corresponding path program 9 times [2019-10-13 17:47:15,791 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:15,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424756072] [2019-10-13 17:47:15,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:15,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:16,038 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 4 proven. 324 refuted. 0 times theorem prover too weak. 489 trivial. 0 not checked. [2019-10-13 17:47:16,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424756072] [2019-10-13 17:47:16,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361166722] [2019-10-13 17:47:16,038 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:16,146 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 17:47:16,146 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:16,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 28 conjunts are in the unsatisfiable core [2019-10-13 17:47:16,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:16,359 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 [2019-10-13 17:47:16,359 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:16,361 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:16,362 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:16,362 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:47:16,385 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:16,498 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 6 proven. 141 refuted. 0 times theorem prover too weak. 670 trivial. 0 not checked. [2019-10-13 17:47:16,499 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:16,499 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 36 [2019-10-13 17:47:16,500 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490419985] [2019-10-13 17:47:16,501 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 17:47:16,501 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:16,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 17:47:16,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=954, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 17:47:16,502 INFO L87 Difference]: Start difference. First operand 124 states and 144 transitions. Second operand 36 states. [2019-10-13 17:47:18,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:18,335 INFO L93 Difference]: Finished difference Result 283 states and 348 transitions. [2019-10-13 17:47:18,335 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-13 17:47:18,336 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 121 [2019-10-13 17:47:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:18,338 INFO L225 Difference]: With dead ends: 283 [2019-10-13 17:47:18,338 INFO L226 Difference]: Without dead ends: 202 [2019-10-13 17:47:18,340 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1466 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1265, Invalid=4897, Unknown=0, NotChecked=0, Total=6162 [2019-10-13 17:47:18,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-10-13 17:47:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 191. [2019-10-13 17:47:18,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2019-10-13 17:47:18,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 230 transitions. [2019-10-13 17:47:18,354 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 230 transitions. Word has length 121 [2019-10-13 17:47:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:18,354 INFO L462 AbstractCegarLoop]: Abstraction has 191 states and 230 transitions. [2019-10-13 17:47:18,354 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 17:47:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 230 transitions. [2019-10-13 17:47:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-10-13 17:47:18,355 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:18,356 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] [2019-10-13 17:47:18,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:18,560 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:18,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:18,560 INFO L82 PathProgramCache]: Analyzing trace with hash -688313295, now seen corresponding path program 4 times [2019-10-13 17:47:18,560 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:18,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58625110] [2019-10-13 17:47:18,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:18,560 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:18,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:18,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:18,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:18,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:18,826 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 4 proven. 361 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-13 17:47:18,826 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58625110] [2019-10-13 17:47:18,827 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562645553] [2019-10-13 17:47:18,827 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:18,923 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:18,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:18,924 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 21 conjunts are in the unsatisfiable core [2019-10-13 17:47:18,926 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 909 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2019-10-13 17:47:18,957 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:18,957 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-10-13 17:47:18,958 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071413072] [2019-10-13 17:47:18,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 17:47:18,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:18,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 17:47:18,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:47:18,959 INFO L87 Difference]: Start difference. First operand 191 states and 230 transitions. Second operand 24 states. [2019-10-13 17:47:19,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:19,261 INFO L93 Difference]: Finished difference Result 350 states and 434 transitions. [2019-10-13 17:47:19,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 17:47:19,263 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 126 [2019-10-13 17:47:19,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:19,264 INFO L225 Difference]: With dead ends: 350 [2019-10-13 17:47:19,264 INFO L226 Difference]: Without dead ends: 204 [2019-10-13 17:47:19,265 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-10-13 17:47:19,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-10-13 17:47:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 199. [2019-10-13 17:47:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2019-10-13 17:47:19,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 240 transitions. [2019-10-13 17:47:19,279 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 240 transitions. Word has length 126 [2019-10-13 17:47:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:19,279 INFO L462 AbstractCegarLoop]: Abstraction has 199 states and 240 transitions. [2019-10-13 17:47:19,279 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 17:47:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 240 transitions. [2019-10-13 17:47:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-13 17:47:19,281 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:19,281 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] [2019-10-13 17:47:19,484 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:19,485 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:19,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:19,485 INFO L82 PathProgramCache]: Analyzing trace with hash 868455985, now seen corresponding path program 5 times [2019-10-13 17:47:19,486 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:19,486 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946951631] [2019-10-13 17:47:19,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:19,486 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:19,487 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:19,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:19,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2019-10-13 17:47:19,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946951631] [2019-10-13 17:47:19,779 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929363270] [2019-10-13 17:47:19,780 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:20,703 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2019-10-13 17:47:20,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:20,707 INFO L256 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-13 17:47:20,709 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1006 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2019-10-13 17:47:20,744 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:20,744 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-10-13 17:47:20,744 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659061355] [2019-10-13 17:47:20,744 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 17:47:20,745 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:20,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 17:47:20,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-10-13 17:47:20,745 INFO L87 Difference]: Start difference. First operand 199 states and 240 transitions. Second operand 25 states. [2019-10-13 17:47:20,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:20,981 INFO L93 Difference]: Finished difference Result 364 states and 452 transitions. [2019-10-13 17:47:20,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 17:47:20,982 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 131 [2019-10-13 17:47:20,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:20,984 INFO L225 Difference]: With dead ends: 364 [2019-10-13 17:47:20,984 INFO L226 Difference]: Without dead ends: 212 [2019-10-13 17:47:20,985 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 [2019-10-13 17:47:20,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2019-10-13 17:47:21,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 207. [2019-10-13 17:47:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-10-13 17:47:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 250 transitions. [2019-10-13 17:47:21,004 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 250 transitions. Word has length 131 [2019-10-13 17:47:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:21,004 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 250 transitions. [2019-10-13 17:47:21,004 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 17:47:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 250 transitions. [2019-10-13 17:47:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-13 17:47:21,006 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:21,006 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] [2019-10-13 17:47:21,210 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:21,211 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:21,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:21,211 INFO L82 PathProgramCache]: Analyzing trace with hash -7078731, now seen corresponding path program 6 times [2019-10-13 17:47:21,212 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:21,212 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61003465] [2019-10-13 17:47:21,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:21,212 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:21,213 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:21,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:21,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:21,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 4 proven. 441 refuted. 0 times theorem prover too weak. 663 trivial. 0 not checked. [2019-10-13 17:47:21,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61003465] [2019-10-13 17:47:21,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529475770] [2019-10-13 17:47:21,581 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:21,987 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-10-13 17:47:21,988 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:21,990 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 17:47:21,992 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:22,476 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:22,476 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 [2019-10-13 17:47:22,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:22,478 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:22,487 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:22,488 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:22,488 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:5 [2019-10-13 17:47:22,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:22,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1108 backedges. 56 proven. 168 refuted. 0 times theorem prover too weak. 884 trivial. 0 not checked. [2019-10-13 17:47:22,601 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:22,601 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 19] total 42 [2019-10-13 17:47:22,601 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58304622] [2019-10-13 17:47:22,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-13 17:47:22,602 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:22,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-13 17:47:22,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1323, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 17:47:22,603 INFO L87 Difference]: Start difference. First operand 207 states and 250 transitions. Second operand 42 states. [2019-10-13 17:47:27,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:27,756 INFO L93 Difference]: Finished difference Result 406 states and 497 transitions. [2019-10-13 17:47:27,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2019-10-13 17:47:27,756 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 136 [2019-10-13 17:47:27,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:27,759 INFO L225 Difference]: With dead ends: 406 [2019-10-13 17:47:27,759 INFO L226 Difference]: Without dead ends: 248 [2019-10-13 17:47:27,764 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7136 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4503, Invalid=16377, Unknown=0, NotChecked=0, Total=20880 [2019-10-13 17:47:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2019-10-13 17:47:27,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 152. [2019-10-13 17:47:27,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2019-10-13 17:47:27,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 176 transitions. [2019-10-13 17:47:27,775 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 176 transitions. Word has length 136 [2019-10-13 17:47:27,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:27,775 INFO L462 AbstractCegarLoop]: Abstraction has 152 states and 176 transitions. [2019-10-13 17:47:27,775 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-13 17:47:27,775 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 176 transitions. [2019-10-13 17:47:27,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2019-10-13 17:47:27,776 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:27,776 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] [2019-10-13 17:47:27,980 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:27,981 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:27,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:27,981 INFO L82 PathProgramCache]: Analyzing trace with hash -74610458, now seen corresponding path program 10 times [2019-10-13 17:47:27,982 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:27,982 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015667168] [2019-10-13 17:47:27,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:27,982 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:27,983 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:28,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:28,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 6 proven. 715 refuted. 0 times theorem prover too weak. 514 trivial. 0 not checked. [2019-10-13 17:47:28,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015667168] [2019-10-13 17:47:28,446 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069201980] [2019-10-13 17:47:28,446 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 [2019-10-13 17:47:28,549 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 17:47:28,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:28,550 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-13 17:47:28,553 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:28,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 751 trivial. 0 not checked. [2019-10-13 17:47:28,581 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:28,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-10-13 17:47:28,581 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832887257] [2019-10-13 17:47:28,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 17:47:28,582 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 17:47:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-10-13 17:47:28,583 INFO L87 Difference]: Start difference. First operand 152 states and 176 transitions. Second operand 27 states. [2019-10-13 17:47:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:28,925 INFO L93 Difference]: Finished difference Result 261 states and 312 transitions. [2019-10-13 17:47:28,926 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 17:47:28,926 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 149 [2019-10-13 17:47:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:28,927 INFO L225 Difference]: With dead ends: 261 [2019-10-13 17:47:28,927 INFO L226 Difference]: Without dead ends: 160 [2019-10-13 17:47:28,927 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 [2019-10-13 17:47:28,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-10-13 17:47:28,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2019-10-13 17:47:28,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-10-13 17:47:28,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2019-10-13 17:47:28,940 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 149 [2019-10-13 17:47:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:28,940 INFO L462 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2019-10-13 17:47:28,941 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 17:47:28,941 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2019-10-13 17:47:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-10-13 17:47:28,942 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:28,943 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] [2019-10-13 17:47:29,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:29,148 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:29,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:29,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1658402930, now seen corresponding path program 11 times [2019-10-13 17:47:29,149 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:29,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531696833] [2019-10-13 17:47:29,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:29,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:29,150 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:29,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 6 proven. 782 refuted. 0 times theorem prover too weak. 559 trivial. 0 not checked. [2019-10-13 17:47:29,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531696833] [2019-10-13 17:47:29,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18011763] [2019-10-13 17:47:29,740 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 [2019-10-13 17:47:30,969 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-10-13 17:47:30,969 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:30,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 25 conjunts are in the unsatisfiable core [2019-10-13 17:47:30,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 1347 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 818 trivial. 0 not checked. [2019-10-13 17:47:31,019 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:31,019 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-10-13 17:47:31,019 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717246663] [2019-10-13 17:47:31,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 17:47:31,020 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:31,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 17:47:31,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:47:31,021 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand 28 states. [2019-10-13 17:47:31,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:31,292 INFO L93 Difference]: Finished difference Result 269 states and 322 transitions. [2019-10-13 17:47:31,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 17:47:31,292 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-10-13 17:47:31,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:31,294 INFO L225 Difference]: With dead ends: 269 [2019-10-13 17:47:31,294 INFO L226 Difference]: Without dead ends: 165 [2019-10-13 17:47:31,295 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-10-13 17:47:31,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-13 17:47:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2019-10-13 17:47:31,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2019-10-13 17:47:31,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 188 transitions. [2019-10-13 17:47:31,306 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 188 transitions. Word has length 154 [2019-10-13 17:47:31,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:31,306 INFO L462 AbstractCegarLoop]: Abstraction has 162 states and 188 transitions. [2019-10-13 17:47:31,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 17:47:31,306 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 188 transitions. [2019-10-13 17:47:31,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-10-13 17:47:31,307 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:31,307 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] [2019-10-13 17:47:31,514 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:31,514 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:31,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1479239778, now seen corresponding path program 12 times [2019-10-13 17:47:31,515 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:31,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975596092] [2019-10-13 17:47:31,515 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:31,516 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:31,516 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:31,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:31,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 17:47:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 6 proven. 852 refuted. 0 times theorem prover too weak. 606 trivial. 0 not checked. [2019-10-13 17:47:31,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975596092] [2019-10-13 17:47:31,968 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770655758] [2019-10-13 17:47:31,968 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 [2019-10-13 17:47:33,140 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2019-10-13 17:47:33,140 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 17:47:33,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 32 conjunts are in the unsatisfiable core [2019-10-13 17:47:33,147 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 17:47:33,512 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 [2019-10-13 17:47:33,513 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-13 17:47:33,515 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-13 17:47:33,516 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-13 17:47:33,516 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:15, output treesize:3 [2019-10-13 17:47:33,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 17:47:33,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 11 proven. 261 refuted. 0 times theorem prover too weak. 1192 trivial. 0 not checked. [2019-10-13 17:47:33,738 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-13 17:47:33,739 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 18] total 44 [2019-10-13 17:47:33,739 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613792322] [2019-10-13 17:47:33,740 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-10-13 17:47:33,740 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 17:47:33,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-10-13 17:47:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=494, Invalid=1398, Unknown=0, NotChecked=0, Total=1892 [2019-10-13 17:47:33,742 INFO L87 Difference]: Start difference. First operand 162 states and 188 transitions. Second operand 44 states. [2019-10-13 17:47:36,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 17:47:36,427 INFO L93 Difference]: Finished difference Result 366 states and 449 transitions. [2019-10-13 17:47:36,427 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-10-13 17:47:36,427 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 159 [2019-10-13 17:47:36,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 17:47:36,429 INFO L225 Difference]: With dead ends: 366 [2019-10-13 17:47:36,429 INFO L226 Difference]: Without dead ends: 259 [2019-10-13 17:47:36,432 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 [2019-10-13 17:47:36,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2019-10-13 17:47:36,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 248. [2019-10-13 17:47:36,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2019-10-13 17:47:36,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 299 transitions. [2019-10-13 17:47:36,450 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 299 transitions. Word has length 159 [2019-10-13 17:47:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 17:47:36,450 INFO L462 AbstractCegarLoop]: Abstraction has 248 states and 299 transitions. [2019-10-13 17:47:36,450 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-10-13 17:47:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 299 transitions. [2019-10-13 17:47:36,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-13 17:47:36,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 17:47:36,452 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] [2019-10-13 17:47:36,657 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 17:47:36,657 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 17:47:36,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 17:47:36,658 INFO L82 PathProgramCache]: Analyzing trace with hash 895048948, now seen corresponding path program 7 times [2019-10-13 17:47:36,658 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 17:47:36,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838287915] [2019-10-13 17:47:36,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:36,659 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 17:47:36,659 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 17:47:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat