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/sanfoundry_10_ground.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:42:27,294 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:42:27,297 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:42:27,315 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:42:27,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:42:27,318 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:42:27,320 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:42:27,329 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:42:27,333 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:42:27,336 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:42:27,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:42:27,339 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:42:27,340 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:42:27,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:42:27,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:42:27,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:42:27,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:42:27,347 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:42:27,350 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:42:27,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:42:27,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:42:27,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:42:27,364 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:42:27,364 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:42:27,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:42:27,367 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:42:27,367 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:42:27,369 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:42:27,370 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:42:27,371 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:42:27,371 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:42:27,372 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:42:27,373 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:42:27,373 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:42:27,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:42:27,375 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:42:27,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:42:27,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:42:27,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:42:27,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:42:27,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:42:27,379 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 21:42:27,404 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:42:27,404 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:42:27,406 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:42:27,406 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:42:27,406 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:42:27,406 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:42:27,408 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:42:27,408 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:42:27,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:42:27,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:42:27,409 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:42:27,409 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:42:27,409 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:42:27,410 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:42:27,410 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:42:27,410 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:42:27,410 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:42:27,412 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:42:27,412 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:42:27,412 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:42:27,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:42:27,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:27,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:42:27,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:42:27,416 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:42:27,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:42:27,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:42:27,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:42:27,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:42:27,695 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:42:27,708 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:42:27,712 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:42:27,713 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:42:27,714 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:42:27,714 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-10-14 21:42:27,792 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3c7bd73/65fc1b552a30492e95bd6bad5cdba9c5/FLAG5dbe18ff7 [2019-10-14 21:42:28,245 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:42:28,245 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/sanfoundry_10_ground.c [2019-10-14 21:42:28,251 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3c7bd73/65fc1b552a30492e95bd6bad5cdba9c5/FLAG5dbe18ff7 [2019-10-14 21:42:28,611 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c3c7bd73/65fc1b552a30492e95bd6bad5cdba9c5 [2019-10-14 21:42:28,624 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:42:28,625 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:42:28,626 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:28,627 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:42:28,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:42:28,631 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bdcd6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28, skipping insertion in model container [2019-10-14 21:42:28,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:28,642 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:42:28,665 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:42:28,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:28,911 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:42:28,934 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:42:28,953 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:42:28,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28 WrapperNode [2019-10-14 21:42:28,954 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:42:28,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:42:28,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:42:28,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:42:29,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:29,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:29,053 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:29,053 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:29,070 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:29,076 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:29,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... [2019-10-14 21:42:29,080 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:42:29,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:42:29,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:42:29,081 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:42:29,082 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:42:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:42:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:42:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:42:29,144 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:42:29,144 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:42:29,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:42:29,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:42:29,451 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:42:29,452 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-14 21:42:29,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:29 BoogieIcfgContainer [2019-10-14 21:42:29,453 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:42:29,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:42:29,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:42:29,469 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:42:29,473 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:42:28" (1/3) ... [2019-10-14 21:42:29,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ede2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:29, skipping insertion in model container [2019-10-14 21:42:29,475 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:42:28" (2/3) ... [2019-10-14 21:42:29,475 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60ede2ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:42:29, skipping insertion in model container [2019-10-14 21:42:29,476 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:42:29" (3/3) ... [2019-10-14 21:42:29,477 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_10_ground.c [2019-10-14 21:42:29,488 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:42:29,496 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:42:29,505 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:42:29,535 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:42:29,535 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:42:29,535 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:42:29,536 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:42:29,537 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:42:29,537 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:42:29,537 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:42:29,537 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:42:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-10-14 21:42:29,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:29,561 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:29,562 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:29,564 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:29,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:29,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1746448729, now seen corresponding path program 1 times [2019-10-14 21:42:29,576 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:29,577 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112337594] [2019-10-14 21:42:29,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,577 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,577 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:29,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:29,750 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112337594] [2019-10-14 21:42:29,751 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:29,752 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:42:29,753 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234677288] [2019-10-14 21:42:29,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:29,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:29,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:29,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:29,780 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-10-14 21:42:29,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:29,915 INFO L93 Difference]: Finished difference Result 54 states and 75 transitions. [2019-10-14 21:42:29,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:29,917 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:42:29,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:29,925 INFO L225 Difference]: With dead ends: 54 [2019-10-14 21:42:29,926 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 21:42:29,930 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:42:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 21:42:29,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 21:42:29,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 21:42:29,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2019-10-14 21:42:29,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 16 [2019-10-14 21:42:29,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:29,971 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2019-10-14 21:42:29,971 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:29,971 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2019-10-14 21:42:29,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:42:29,972 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:29,973 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:29,973 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:29,974 INFO L82 PathProgramCache]: Analyzing trace with hash 934485258, now seen corresponding path program 1 times [2019-10-14 21:42:29,974 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:29,975 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094687041] [2019-10-14 21:42:29,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,975 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:29,975 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:30,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094687041] [2019-10-14 21:42:30,078 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:30,078 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:30,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847077599] [2019-10-14 21:42:30,084 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:30,084 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:30,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:30,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:30,086 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2019-10-14 21:42:30,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:30,179 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-10-14 21:42:30,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:30,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-10-14 21:42:30,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:30,181 INFO L225 Difference]: With dead ends: 43 [2019-10-14 21:42:30,181 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 21:42:30,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:30,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 21:42:30,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 21:42:30,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:42:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-10-14 21:42:30,191 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2019-10-14 21:42:30,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:30,191 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-10-14 21:42:30,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:30,192 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-10-14 21:42:30,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 21:42:30,193 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:30,193 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:30,193 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:30,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1806235348, now seen corresponding path program 1 times [2019-10-14 21:42:30,194 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:30,195 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420315239] [2019-10-14 21:42:30,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,195 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,195 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:42:30,341 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420315239] [2019-10-14 21:42:30,342 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129863050] [2019-10-14 21:42:30,342 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:30,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,412 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:42:30,419 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:30,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:30,463 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:42:30,463 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-10-14 21:42:30,463 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389211711] [2019-10-14 21:42:30,464 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:42:30,464 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:30,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:42:30,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:30,465 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-10-14 21:42:30,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:30,500 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-10-14 21:42:30,501 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:42:30,501 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2019-10-14 21:42:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:30,502 INFO L225 Difference]: With dead ends: 50 [2019-10-14 21:42:30,502 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 21:42:30,503 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:42:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 21:42:30,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-10-14 21:42:30,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 21:42:30,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-10-14 21:42:30,510 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2019-10-14 21:42:30,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:30,511 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-10-14 21:42:30,511 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:42:30,511 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-10-14 21:42:30,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 21:42:30,512 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:30,512 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:30,715 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:30,717 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:30,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:30,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1568565518, now seen corresponding path program 1 times [2019-10-14 21:42:30,718 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:30,719 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722137217] [2019-10-14 21:42:30,719 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,720 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:30,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:30,829 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722137217] [2019-10-14 21:42:30,830 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128464953] [2019-10-14 21:42:30,830 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:30,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:30,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:42:30,879 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:30,921 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 21:42:30,922 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:30,922 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 8 [2019-10-14 21:42:30,923 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135444497] [2019-10-14 21:42:30,923 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-14 21:42:30,924 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:30,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-14 21:42:30,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-10-14 21:42:30,925 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-10-14 21:42:31,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:31,124 INFO L93 Difference]: Finished difference Result 78 states and 95 transitions. [2019-10-14 21:42:31,124 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 21:42:31,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2019-10-14 21:42:31,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:31,127 INFO L225 Difference]: With dead ends: 78 [2019-10-14 21:42:31,127 INFO L226 Difference]: Without dead ends: 58 [2019-10-14 21:42:31,128 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2019-10-14 21:42:31,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-10-14 21:42:31,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2019-10-14 21:42:31,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:42:31,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 21:42:31,145 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 22 [2019-10-14 21:42:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:31,145 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 21:42:31,147 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-14 21:42:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 21:42:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 21:42:31,150 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:31,150 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:31,359 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:31,360 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:31,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:31,360 INFO L82 PathProgramCache]: Analyzing trace with hash 317446851, now seen corresponding path program 1 times [2019-10-14 21:42:31,361 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:31,361 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326117568] [2019-10-14 21:42:31,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,362 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,362 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:31,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:31,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326117568] [2019-10-14 21:42:31,475 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558830968] [2019-10-14 21:42:31,475 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:42:31,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:31,558 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:31,558 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2019-10-14 21:42:31,559 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366748440] [2019-10-14 21:42:31,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:42:31,559 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:31,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:42:31,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:31,560 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 9 states. [2019-10-14 21:42:31,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:31,649 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2019-10-14 21:42:31,649 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:42:31,649 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-10-14 21:42:31,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:31,650 INFO L225 Difference]: With dead ends: 70 [2019-10-14 21:42:31,650 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 21:42:31,651 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:42:31,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 21:42:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-10-14 21:42:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 21:42:31,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2019-10-14 21:42:31,668 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 27 [2019-10-14 21:42:31,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:31,668 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2019-10-14 21:42:31,669 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:42:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2019-10-14 21:42:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 21:42:31,670 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:31,673 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:31,874 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:31,875 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:31,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1146435745, now seen corresponding path program 2 times [2019-10-14 21:42:31,876 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:31,876 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604958913] [2019-10-14 21:42:31,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,877 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:31,877 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:31,962 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:42:31,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604958913] [2019-10-14 21:42:31,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525843347] [2019-10-14 21:42:31,963 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:32,009 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:32,009 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:32,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:42:32,013 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:32,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-10-14 21:42:32,069 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:32,070 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-10-14 21:42:32,070 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985898501] [2019-10-14 21:42:32,071 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 21:42:32,071 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:32,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 21:42:32,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2019-10-14 21:42:32,072 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 11 states. [2019-10-14 21:42:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:32,412 INFO L93 Difference]: Finished difference Result 113 states and 139 transitions. [2019-10-14 21:42:32,412 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:42:32,412 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2019-10-14 21:42:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:32,414 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:42:32,414 INFO L226 Difference]: Without dead ends: 85 [2019-10-14 21:42:32,415 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:32,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-10-14 21:42:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 50. [2019-10-14 21:42:32,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 21:42:32,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2019-10-14 21:42:32,435 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 29 [2019-10-14 21:42:32,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:32,435 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2019-10-14 21:42:32,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 21:42:32,435 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2019-10-14 21:42:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:42:32,437 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:32,438 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:32,645 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:32,645 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:32,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:32,646 INFO L82 PathProgramCache]: Analyzing trace with hash 321576404, now seen corresponding path program 3 times [2019-10-14 21:42:32,646 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:32,646 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140742741] [2019-10-14 21:42:32,646 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,647 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:32,647 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:32,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-10-14 21:42:32,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140742741] [2019-10-14 21:42:32,760 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438199704] [2019-10-14 21:42:32,760 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:32,811 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:32,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:32,812 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2019-10-14 21:42:32,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:32,964 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 16 treesize of output 8 [2019-10-14 21:42:32,965 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:32,968 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:32,969 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:32,969 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:4 [2019-10-14 21:42:32,980 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:33,016 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-14 21:42:33,017 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:33,017 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2019-10-14 21:42:33,017 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834876793] [2019-10-14 21:42:33,018 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:33,018 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:33,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:33,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:33,019 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 17 states. [2019-10-14 21:42:33,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:33,619 INFO L93 Difference]: Finished difference Result 113 states and 136 transitions. [2019-10-14 21:42:33,619 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 21:42:33,619 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2019-10-14 21:42:33,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:33,621 INFO L225 Difference]: With dead ends: 113 [2019-10-14 21:42:33,621 INFO L226 Difference]: Without dead ends: 78 [2019-10-14 21:42:33,622 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2019-10-14 21:42:33,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-10-14 21:42:33,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 69. [2019-10-14 21:42:33,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:42:33,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2019-10-14 21:42:33,634 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 34 [2019-10-14 21:42:33,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:33,634 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2019-10-14 21:42:33,634 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:33,634 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2019-10-14 21:42:33,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 21:42:33,635 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:33,636 INFO L380 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:33,839 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:33,840 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:33,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:33,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1613423984, now seen corresponding path program 1 times [2019-10-14 21:42:33,841 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:33,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291658276] [2019-10-14 21:42:33,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:33,842 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:33,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,929 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-10-14 21:42:33,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291658276] [2019-10-14 21:42:33,930 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623356343] [2019-10-14 21:42:33,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:33,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:33,977 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:42:33,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-14 21:42:34,093 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:34,093 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2019-10-14 21:42:34,093 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976228601] [2019-10-14 21:42:34,094 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 21:42:34,095 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:34,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 21:42:34,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2019-10-14 21:42:34,096 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand 15 states. [2019-10-14 21:42:34,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:34,444 INFO L93 Difference]: Finished difference Result 204 states and 247 transitions. [2019-10-14 21:42:34,444 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 21:42:34,444 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2019-10-14 21:42:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:34,448 INFO L225 Difference]: With dead ends: 204 [2019-10-14 21:42:34,449 INFO L226 Difference]: Without dead ends: 152 [2019-10-14 21:42:34,450 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2019-10-14 21:42:34,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2019-10-14 21:42:34,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 78. [2019-10-14 21:42:34,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-10-14 21:42:34,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2019-10-14 21:42:34,464 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 36 [2019-10-14 21:42:34,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:34,464 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2019-10-14 21:42:34,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 21:42:34,464 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2019-10-14 21:42:34,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 21:42:34,466 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:34,466 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:34,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,670 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:34,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1163880982, now seen corresponding path program 4 times [2019-10-14 21:42:34,671 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:34,671 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084366792] [2019-10-14 21:42:34,671 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,672 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,672 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-10-14 21:42:34,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084366792] [2019-10-14 21:42:34,726 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:42:34,726 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:42:34,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597184464] [2019-10-14 21:42:34,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:42:34,727 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:34,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:42:34,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:34,727 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 4 states. [2019-10-14 21:42:34,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:34,803 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2019-10-14 21:42:34,803 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:42:34,803 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2019-10-14 21:42:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:34,804 INFO L225 Difference]: With dead ends: 97 [2019-10-14 21:42:34,804 INFO L226 Difference]: Without dead ends: 69 [2019-10-14 21:42:34,805 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:42:34,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-10-14 21:42:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-10-14 21:42:34,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-10-14 21:42:34,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2019-10-14 21:42:34,817 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 38 [2019-10-14 21:42:34,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:34,817 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2019-10-14 21:42:34,817 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:42:34,818 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2019-10-14 21:42:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 21:42:34,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:34,819 INFO L380 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:34,819 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:34,819 INFO L82 PathProgramCache]: Analyzing trace with hash -216190442, now seen corresponding path program 1 times [2019-10-14 21:42:34,820 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:34,820 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593756054] [2019-10-14 21:42:34,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,820 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:34,820 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,908 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:42:34,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593756054] [2019-10-14 21:42:34,908 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316966980] [2019-10-14 21:42:34,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:34,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:34,952 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-14 21:42:34,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:42:35,067 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:35,067 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2019-10-14 21:42:35,067 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992055080] [2019-10-14 21:42:35,068 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 21:42:35,068 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:35,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 21:42:35,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:35,069 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 17 states. [2019-10-14 21:42:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:35,168 INFO L93 Difference]: Finished difference Result 122 states and 134 transitions. [2019-10-14 21:42:35,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 21:42:35,168 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 40 [2019-10-14 21:42:35,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:35,169 INFO L225 Difference]: With dead ends: 122 [2019-10-14 21:42:35,170 INFO L226 Difference]: Without dead ends: 72 [2019-10-14 21:42:35,171 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2019-10-14 21:42:35,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-10-14 21:42:35,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-10-14 21:42:35,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:42:35,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2019-10-14 21:42:35,181 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 40 [2019-10-14 21:42:35,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:35,181 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2019-10-14 21:42:35,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 21:42:35,181 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2019-10-14 21:42:35,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 21:42:35,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:35,182 INFO L380 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:35,387 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,388 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2065183496, now seen corresponding path program 2 times [2019-10-14 21:42:35,389 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:35,389 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982839696] [2019-10-14 21:42:35,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,389 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,390 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:35,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:42:35,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982839696] [2019-10-14 21:42:35,488 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249638573] [2019-10-14 21:42:35,488 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:42:35,539 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:35,540 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-14 21:42:35,542 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:35,656 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:42:35,657 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:35,657 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-10-14 21:42:35,657 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814478505] [2019-10-14 21:42:35,658 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 21:42:35,658 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 21:42:35,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:35,659 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 19 states. [2019-10-14 21:42:35,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:42:35,754 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2019-10-14 21:42:35,758 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 21:42:35,758 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2019-10-14 21:42:35,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:42:35,759 INFO L225 Difference]: With dead ends: 124 [2019-10-14 21:42:35,759 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:42:35,760 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2019-10-14 21:42:35,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:42:35,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-10-14 21:42:35,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-10-14 21:42:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2019-10-14 21:42:35,770 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 42 [2019-10-14 21:42:35,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:42:35,771 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2019-10-14 21:42:35,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 21:42:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2019-10-14 21:42:35,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 21:42:35,772 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:42:35,773 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:42:35,978 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:35,978 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:42:35,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:42:35,979 INFO L82 PathProgramCache]: Analyzing trace with hash -831047846, now seen corresponding path program 3 times [2019-10-14 21:42:35,979 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:42:35,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127461833] [2019-10-14 21:42:35,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,980 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:42:35,980 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:42:35,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:42:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-14 21:42:36,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127461833] [2019-10-14 21:42:36,107 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058947640] [2019-10-14 21:42:36,107 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:42:36,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 21:42:36,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:42:36,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 24 conjunts are in the unsatisfiable core [2019-10-14 21:42:36,154 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:42:36,293 INFO L341 Elim1Store]: treesize reduction 52, result has 45.8 percent of original size [2019-10-14 21:42:36,294 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 59 [2019-10-14 21:42:36,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:36,298 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:36,332 INFO L567 ElimStorePlain]: treesize reduction 24, result has 64.2 percent of original size [2019-10-14 21:42:36,333 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:36,333 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:43 [2019-10-14 21:42:36,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:42,466 WARN L191 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 34 [2019-10-14 21:42:42,468 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:48,505 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2019-10-14 21:42:50,567 WARN L191 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 25 [2019-10-14 21:42:50,577 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:50,578 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:50,580 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-10-14 21:42:50,581 INFO L341 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:50,582 INFO L375 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 11 [2019-10-14 21:42:50,583 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-10-14 21:42:50,592 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-10-14 21:42:50,593 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-10-14 21:42:50,593 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:4 [2019-10-14 21:42:50,610 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 21:42:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-10-14 21:42:50,660 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 21:42:50,660 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2019-10-14 21:42:50,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475336266] [2019-10-14 21:42:50,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 21:42:50,661 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:42:50,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 21:42:50,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=449, Unknown=4, NotChecked=0, Total=552 [2019-10-14 21:42:50,662 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand 24 states.