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_copy2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 09:31:24,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 09:31:24,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 09:31:24,517 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 09:31:24,517 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 09:31:24,519 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 09:31:24,520 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 09:31:24,522 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 09:31:24,524 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 09:31:24,525 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 09:31:24,526 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 09:31:24,527 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 09:31:24,527 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 09:31:24,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 09:31:24,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 09:31:24,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 09:31:24,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 09:31:24,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 09:31:24,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 09:31:24,536 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 09:31:24,538 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 09:31:24,539 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 09:31:24,540 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 09:31:24,541 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 09:31:24,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-09-07 09:31:24,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-09-07 09:31:24,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-09-07 09:31:24,545 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-09-07 09:31:24,545 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-09-07 09:31:24,546 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-09-07 09:31:24,546 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-09-07 09:31:24,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-09-07 09:31:24,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-09-07 09:31:24,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-09-07 09:31:24,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-09-07 09:31:24,550 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-09-07 09:31:24,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-09-07 09:31:24,551 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-09-07 09:31:24,551 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 09:31:24,552 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 09:31:24,553 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 09:31:24,554 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 [2019-09-07 09:31:24,569 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 09:31:24,569 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 09:31:24,571 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 09:31:24,571 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 09:31:24,571 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 09:31:24,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 09:31:24,571 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 09:31:24,572 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 09:31:24,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 09:31:24,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 09:31:24,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 09:31:24,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 09:31:24,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 09:31:24,573 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 09:31:24,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 09:31:24,573 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 09:31:24,573 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 09:31:24,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 09:31:24,574 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 09:31:24,574 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 09:31:24,574 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 09:31:24,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 09:31:24,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 09:31:24,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 09:31:24,575 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 09:31:24,575 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 09:31:24,576 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 09:31:24,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 09:31:24,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 09:31:24,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 09:31:24,620 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 09:31:24,623 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 09:31:24,625 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 09:31:24,625 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 09:31:24,626 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-09-07 09:31:24,690 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d2997098/5091452722b943b6ab744c5d8311fdab/FLAGbe4d38b3a [2019-09-07 09:31:25,133 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 09:31:25,135 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy2_ground-2.i [2019-09-07 09:31:25,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d2997098/5091452722b943b6ab744c5d8311fdab/FLAGbe4d38b3a [2019-09-07 09:31:25,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d2997098/5091452722b943b6ab744c5d8311fdab [2019-09-07 09:31:25,517 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 09:31:25,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 09:31:25,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 09:31:25,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 09:31:25,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 09:31:25,528 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,531 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e7ff09f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25, skipping insertion in model container [2019-09-07 09:31:25,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,540 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 09:31:25,561 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 09:31:25,780 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:31:25,785 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 09:31:25,810 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 09:31:25,828 INFO L192 MainTranslator]: Completed translation [2019-09-07 09:31:25,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25 WrapperNode [2019-09-07 09:31:25,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 09:31:25,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 09:31:25,829 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 09:31:25,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 09:31:25,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,944 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,960 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,968 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (1/1) ... [2019-09-07 09:31:25,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 09:31:25,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 09:31:25,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 09:31:25,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 09:31:25,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (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 [2019-09-07 09:31:26,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 09:31:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 09:31:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-07 09:31:26,033 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 09:31:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 09:31:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-07 09:31:26,033 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 09:31:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 09:31:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 09:31:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 09:31:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 09:31:26,034 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 09:31:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 09:31:26,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 09:31:26,377 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 09:31:26,377 INFO L283 CfgBuilder]: Removed 4 assume(true) statements. [2019-09-07 09:31:26,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:31:26 BoogieIcfgContainer [2019-09-07 09:31:26,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 09:31:26,381 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 09:31:26,381 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 09:31:26,385 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 09:31:26,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 09:31:25" (1/3) ... [2019-09-07 09:31:26,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca5bf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:31:26, skipping insertion in model container [2019-09-07 09:31:26,386 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 09:31:25" (2/3) ... [2019-09-07 09:31:26,386 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ca5bf1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 09:31:26, skipping insertion in model container [2019-09-07 09:31:26,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 09:31:26" (3/3) ... [2019-09-07 09:31:26,388 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2019-09-07 09:31:26,396 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 09:31:26,403 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 09:31:26,421 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 09:31:26,449 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 09:31:26,450 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 09:31:26,450 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 09:31:26,450 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 09:31:26,450 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 09:31:26,450 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 09:31:26,451 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 09:31:26,451 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 09:31:26,451 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 09:31:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2019-09-07 09:31:26,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 09:31:26,477 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:26,478 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:26,480 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:26,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:26,485 INFO L82 PathProgramCache]: Analyzing trace with hash 415311520, now seen corresponding path program 1 times [2019-09-07 09:31:26,486 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:26,487 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:26,535 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:26,535 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:26,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:31:26,625 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:31:26,625 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 09:31:26,628 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 09:31:26,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 09:31:26,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:31:26,641 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 2 states. [2019-09-07 09:31:26,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:26,669 INFO L93 Difference]: Finished difference Result 52 states and 67 transitions. [2019-09-07 09:31:26,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 09:31:26,671 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2019-09-07 09:31:26,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:26,683 INFO L225 Difference]: With dead ends: 52 [2019-09-07 09:31:26,683 INFO L226 Difference]: Without dead ends: 25 [2019-09-07 09:31:26,687 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 09:31:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-07 09:31:26,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-09-07 09:31:26,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-09-07 09:31:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-09-07 09:31:26,737 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2019-09-07 09:31:26,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:26,737 INFO L475 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-09-07 09:31:26,737 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 09:31:26,738 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-09-07 09:31:26,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-09-07 09:31:26,739 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:26,739 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:26,739 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:26,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1687882214, now seen corresponding path program 1 times [2019-09-07 09:31:26,740 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:26,740 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:26,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:26,742 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:26,742 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:26,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:26,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-07 09:31:26,844 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:31:26,844 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:31:26,845 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:31:26,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:31:26,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:31:26,847 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 3 states. [2019-09-07 09:31:26,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:26,894 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-09-07 09:31:26,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:31:26,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-09-07 09:31:26,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:26,897 INFO L225 Difference]: With dead ends: 44 [2019-09-07 09:31:26,897 INFO L226 Difference]: Without dead ends: 27 [2019-09-07 09:31:26,898 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:31:26,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-09-07 09:31:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2019-09-07 09:31:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 09:31:26,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-09-07 09:31:26,909 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2019-09-07 09:31:26,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:26,909 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-09-07 09:31:26,909 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:31:26,910 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-09-07 09:31:26,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-07 09:31:26,914 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:26,914 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:26,914 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:26,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:26,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1114616120, now seen corresponding path program 1 times [2019-09-07 09:31:26,915 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:26,915 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:26,916 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:26,917 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:26,917 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:27,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-09-07 09:31:27,001 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 09:31:27,002 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 09:31:27,002 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 09:31:27,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 09:31:27,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:31:27,003 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 3 states. [2019-09-07 09:31:27,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:27,048 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-09-07 09:31:27,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 09:31:27,049 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2019-09-07 09:31:27,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:27,050 INFO L225 Difference]: With dead ends: 44 [2019-09-07 09:31:27,050 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 09:31:27,051 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 09:31:27,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 09:31:27,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2019-09-07 09:31:27,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 09:31:27,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2019-09-07 09:31:27,061 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2019-09-07 09:31:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:27,062 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2019-09-07 09:31:27,062 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 09:31:27,062 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2019-09-07 09:31:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-09-07 09:31:27,064 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:27,064 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:27,065 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:27,066 INFO L82 PathProgramCache]: Analyzing trace with hash -825329612, now seen corresponding path program 1 times [2019-09-07 09:31:27,066 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:27,066 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:27,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,068 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:27,068 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-07 09:31:27,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:27,181 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:27,202 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:27,237 INFO L256 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:31:27,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (2)] Exception during sending of exit command (exit): Stream closed [2019-09-07 09:31:27,289 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:27,289 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:31:27,291 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:31:27,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:31:27,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:31:27,295 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 5 states. [2019-09-07 09:31:27,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:27,344 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2019-09-07 09:31:27,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:31:27,345 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2019-09-07 09:31:27,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:27,348 INFO L225 Difference]: With dead ends: 50 [2019-09-07 09:31:27,348 INFO L226 Difference]: Without dead ends: 31 [2019-09-07 09:31:27,349 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:31:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-07 09:31:27,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-07 09:31:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-07 09:31:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-09-07 09:31:27,356 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2019-09-07 09:31:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:27,357 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-09-07 09:31:27,357 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:31:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-09-07 09:31:27,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-09-07 09:31:27,358 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:27,358 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:27,358 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:27,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:27,359 INFO L82 PathProgramCache]: Analyzing trace with hash -425990958, now seen corresponding path program 2 times [2019-09-07 09:31:27,359 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:27,359 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:27,360 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,360 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:27,361 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:27,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-07 09:31:27,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:27,416 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:27,432 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:31:27,464 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:31:27,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:27,466 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 09:31:27,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-09-07 09:31:27,490 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:27,490 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 09:31:27,490 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 09:31:27,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 09:31:27,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:31:27,493 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 5 states. [2019-09-07 09:31:27,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:27,553 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2019-09-07 09:31:27,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 09:31:27,556 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2019-09-07 09:31:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:27,557 INFO L225 Difference]: With dead ends: 51 [2019-09-07 09:31:27,558 INFO L226 Difference]: Without dead ends: 36 [2019-09-07 09:31:27,560 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 09:31:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-09-07 09:31:27,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2019-09-07 09:31:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-09-07 09:31:27,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2019-09-07 09:31:27,571 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 25 [2019-09-07 09:31:27,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:27,572 INFO L475 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2019-09-07 09:31:27,572 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 09:31:27,573 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2019-09-07 09:31:27,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-09-07 09:31:27,577 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:27,577 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:27,577 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:27,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:27,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1714175694, now seen corresponding path program 3 times [2019-09-07 09:31:27,578 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:27,578 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:27,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,582 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:27,582 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 09:31:27,665 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:27,665 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:31:27,681 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:27,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-09-07 09:31:27,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:27,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 09:31:27,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 09:31:27,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:27,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 09:31:27,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:31:27,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:31:27,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:31:27,795 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2019-09-07 09:31:27,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:27,892 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-09-07 09:31:27,892 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:31:27,892 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-09-07 09:31:27,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:27,893 INFO L225 Difference]: With dead ends: 66 [2019-09-07 09:31:27,894 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 09:31:27,894 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:31:27,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 09:31:27,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2019-09-07 09:31:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-09-07 09:31:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2019-09-07 09:31:27,902 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 29 [2019-09-07 09:31:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:27,902 INFO L475 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2019-09-07 09:31:27,902 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:31:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2019-09-07 09:31:27,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-09-07 09:31:27,903 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:27,903 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:27,904 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:27,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:27,904 INFO L82 PathProgramCache]: Analyzing trace with hash 561048040, now seen corresponding path program 4 times [2019-09-07 09:31:27,904 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:27,904 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:27,905 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,906 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:27,906 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:31:27,985 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:27,985 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:28,006 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 09:31:28,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:31:28,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:28,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 09:31:28,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:28,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:31:28,071 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:28,071 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 09:31:28,072 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 09:31:28,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 09:31:28,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:31:28,072 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 7 states. [2019-09-07 09:31:28,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:28,115 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2019-09-07 09:31:28,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 09:31:28,116 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2019-09-07 09:31:28,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:28,117 INFO L225 Difference]: With dead ends: 70 [2019-09-07 09:31:28,117 INFO L226 Difference]: Without dead ends: 43 [2019-09-07 09:31:28,117 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 09:31:28,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-07 09:31:28,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2019-09-07 09:31:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-09-07 09:31:28,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2019-09-07 09:31:28,124 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2019-09-07 09:31:28,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:28,125 INFO L475 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2019-09-07 09:31:28,125 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 09:31:28,125 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2019-09-07 09:31:28,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-07 09:31:28,126 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:28,126 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:28,126 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:28,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:28,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1767528838, now seen corresponding path program 5 times [2019-09-07 09:31:28,127 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:28,127 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:28,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:28,128 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:28,128 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2019-09-07 09:31:28,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:28,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:28,255 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:31:28,397 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-09-07 09:31:28,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:28,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:31:28,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-07 09:31:28,463 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:28,463 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2019-09-07 09:31:28,464 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:31:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:31:28,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:31:28,466 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 11 states. [2019-09-07 09:31:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:28,575 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2019-09-07 09:31:28,576 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 09:31:28,576 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-09-07 09:31:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:28,577 INFO L225 Difference]: With dead ends: 78 [2019-09-07 09:31:28,577 INFO L226 Difference]: Without dead ends: 51 [2019-09-07 09:31:28,578 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:31:28,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-09-07 09:31:28,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2019-09-07 09:31:28,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-07 09:31:28,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2019-09-07 09:31:28,585 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 37 [2019-09-07 09:31:28,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:28,585 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2019-09-07 09:31:28,585 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:31:28,585 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2019-09-07 09:31:28,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-07 09:31:28,587 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:28,587 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:28,587 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:28,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:28,588 INFO L82 PathProgramCache]: Analyzing trace with hash -318121312, now seen corresponding path program 6 times [2019-09-07 09:31:28,588 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:28,588 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:28,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:28,589 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:28,589 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:28,676 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-09-07 09:31:28,676 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:28,677 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:28,696 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:31:28,751 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-09-07 09:31:28,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:28,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 09:31:28,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2019-09-07 09:31:28,791 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:28,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-07 09:31:28,792 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 09:31:28,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 09:31:28,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:31:28,793 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 8 states. [2019-09-07 09:31:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:28,876 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2019-09-07 09:31:28,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-07 09:31:28,877 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 43 [2019-09-07 09:31:28,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:28,878 INFO L225 Difference]: With dead ends: 75 [2019-09-07 09:31:28,879 INFO L226 Difference]: Without dead ends: 54 [2019-09-07 09:31:28,879 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-09-07 09:31:28,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-09-07 09:31:28,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2019-09-07 09:31:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-09-07 09:31:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2019-09-07 09:31:28,894 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 43 [2019-09-07 09:31:28,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:28,895 INFO L475 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2019-09-07 09:31:28,895 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 09:31:28,895 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2019-09-07 09:31:28,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-09-07 09:31:28,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:28,900 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:28,900 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:28,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:28,901 INFO L82 PathProgramCache]: Analyzing trace with hash -249467492, now seen corresponding path program 7 times [2019-09-07 09:31:28,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:28,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:28,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:28,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:28,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:28,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-07 09:31:29,007 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:29,008 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:29,023 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:29,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 09:31:29,056 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-07 09:31:29,081 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:29,081 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-07 09:31:29,081 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-07 09:31:29,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-07 09:31:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:31:29,082 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 9 states. [2019-09-07 09:31:29,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:29,134 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2019-09-07 09:31:29,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 09:31:29,135 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2019-09-07 09:31:29,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:29,148 INFO L225 Difference]: With dead ends: 90 [2019-09-07 09:31:29,148 INFO L226 Difference]: Without dead ends: 55 [2019-09-07 09:31:29,149 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-09-07 09:31:29,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-07 09:31:29,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2019-09-07 09:31:29,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2019-09-07 09:31:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2019-09-07 09:31:29,158 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2019-09-07 09:31:29,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:29,159 INFO L475 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2019-09-07 09:31:29,159 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-07 09:31:29,159 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2019-09-07 09:31:29,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-07 09:31:29,160 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:29,160 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:29,161 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:29,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1472569286, now seen corresponding path program 8 times [2019-09-07 09:31:29,163 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:29,164 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:29,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:29,165 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:29,165 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2019-09-07 09:31:29,278 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:29,278 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:29,296 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:31:29,331 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:31:29,331 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:29,333 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:31:29,335 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:29,455 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2019-09-07 09:31:29,461 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:29,461 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-09-07 09:31:29,462 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:31:29,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:31:29,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:31:29,465 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 15 states. [2019-09-07 09:31:29,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:29,616 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2019-09-07 09:31:29,617 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-07 09:31:29,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 49 [2019-09-07 09:31:29,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:29,619 INFO L225 Difference]: With dead ends: 98 [2019-09-07 09:31:29,619 INFO L226 Difference]: Without dead ends: 63 [2019-09-07 09:31:29,621 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:31:29,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-09-07 09:31:29,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2019-09-07 09:31:29,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-07 09:31:29,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2019-09-07 09:31:29,637 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 49 [2019-09-07 09:31:29,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:29,638 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2019-09-07 09:31:29,638 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:31:29,638 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2019-09-07 09:31:29,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-07 09:31:29,642 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:29,642 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:29,643 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:29,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:29,643 INFO L82 PathProgramCache]: Analyzing trace with hash -263288236, now seen corresponding path program 9 times [2019-09-07 09:31:29,643 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:29,643 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:29,645 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:29,646 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:29,646 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:29,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2019-09-07 09:31:29,768 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:29,768 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:31:29,791 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:30,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-09-07 09:31:30,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:30,062 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 09:31:30,065 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:30,080 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (10)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:31:30,094 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:30,095 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-09-07 09:31:30,095 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-07 09:31:30,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-07 09:31:30,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:31:30,096 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand 10 states. [2019-09-07 09:31:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:30,197 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2019-09-07 09:31:30,198 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-07 09:31:30,199 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2019-09-07 09:31:30,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:30,200 INFO L225 Difference]: With dead ends: 91 [2019-09-07 09:31:30,200 INFO L226 Difference]: Without dead ends: 66 [2019-09-07 09:31:30,206 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-09-07 09:31:30,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2019-09-07 09:31:30,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2019-09-07 09:31:30,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-09-07 09:31:30,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2019-09-07 09:31:30,217 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 55 [2019-09-07 09:31:30,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:30,218 INFO L475 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2019-09-07 09:31:30,218 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-07 09:31:30,218 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2019-09-07 09:31:30,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-09-07 09:31:30,219 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:30,224 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:30,224 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:30,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:30,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1609235632, now seen corresponding path program 10 times [2019-09-07 09:31:30,225 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:30,225 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:30,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:30,226 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:30,226 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-07 09:31:30,334 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:30,334 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:31:30,358 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:30,396 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:31:30,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:30,398 INFO L256 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 09:31:30,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:30,427 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2019-09-07 09:31:30,439 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:30,439 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-07 09:31:30,440 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 09:31:30,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 09:31:30,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:31:30,442 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand 11 states. [2019-09-07 09:31:30,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:30,494 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2019-09-07 09:31:30,494 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-07 09:31:30,494 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 59 [2019-09-07 09:31:30,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:30,495 INFO L225 Difference]: With dead ends: 110 [2019-09-07 09:31:30,496 INFO L226 Difference]: Without dead ends: 67 [2019-09-07 09:31:30,497 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-09-07 09:31:30,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-07 09:31:30,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-09-07 09:31:30,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-09-07 09:31:30,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2019-09-07 09:31:30,512 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2019-09-07 09:31:30,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:30,513 INFO L475 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2019-09-07 09:31:30,513 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 09:31:30,513 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2019-09-07 09:31:30,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-07 09:31:30,518 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:30,518 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:30,518 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:30,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:30,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2077165330, now seen corresponding path program 11 times [2019-09-07 09:31:30,519 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:30,519 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:30,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:30,521 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:30,521 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2019-09-07 09:31:30,651 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:30,651 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:31:30,680 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:34,265 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2019-09-07 09:31:34,266 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:34,273 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 09:31:34,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:34,410 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (12)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:31:34,420 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:34,420 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2019-09-07 09:31:34,421 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 09:31:34,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 09:31:34,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:31:34,421 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand 19 states. [2019-09-07 09:31:34,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:34,553 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-09-07 09:31:34,553 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:31:34,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2019-09-07 09:31:34,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:34,555 INFO L225 Difference]: With dead ends: 118 [2019-09-07 09:31:34,555 INFO L226 Difference]: Without dead ends: 75 [2019-09-07 09:31:34,556 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 09:31:34,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-09-07 09:31:34,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2019-09-07 09:31:34,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-07 09:31:34,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2019-09-07 09:31:34,562 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 61 [2019-09-07 09:31:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:34,562 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2019-09-07 09:31:34,562 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 09:31:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2019-09-07 09:31:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-07 09:31:34,564 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:34,564 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:34,564 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:34,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:34,564 INFO L82 PathProgramCache]: Analyzing trace with hash -967554040, now seen corresponding path program 12 times [2019-09-07 09:31:34,565 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:34,565 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:34,565 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:34,566 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:34,566 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:34,678 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2019-09-07 09:31:34,678 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:34,678 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:34,692 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:31:35,981 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-09-07 09:31:35,981 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:35,985 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 09:31:35,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-09-07 09:31:36,131 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:36,132 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2019-09-07 09:31:36,132 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 09:31:36,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 09:31:36,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:31:36,133 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 21 states. [2019-09-07 09:31:36,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:36,289 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2019-09-07 09:31:36,289 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:31:36,290 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2019-09-07 09:31:36,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:36,291 INFO L225 Difference]: With dead ends: 128 [2019-09-07 09:31:36,291 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 09:31:36,292 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 09:31:36,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 09:31:36,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2019-09-07 09:31:36,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-09-07 09:31:36,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2019-09-07 09:31:36,297 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 67 [2019-09-07 09:31:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:36,297 INFO L475 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2019-09-07 09:31:36,297 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 09:31:36,297 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2019-09-07 09:31:36,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-07 09:31:36,298 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:36,298 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:36,299 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:36,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:36,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1991451554, now seen corresponding path program 13 times [2019-09-07 09:31:36,299 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:36,299 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:36,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:36,300 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:36,300 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:36,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2019-09-07 09:31:36,417 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:36,417 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:31:36,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:36,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:36,482 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 09:31:36,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2019-09-07 09:31:36,640 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:36,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2019-09-07 09:31:36,640 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:31:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:31:36,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:31:36,641 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 23 states. [2019-09-07 09:31:36,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:36,806 INFO L93 Difference]: Finished difference Result 138 states and 146 transitions. [2019-09-07 09:31:36,806 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 09:31:36,806 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 73 [2019-09-07 09:31:36,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:36,807 INFO L225 Difference]: With dead ends: 138 [2019-09-07 09:31:36,807 INFO L226 Difference]: Without dead ends: 87 [2019-09-07 09:31:36,808 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:31:36,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-09-07 09:31:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2019-09-07 09:31:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-07 09:31:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2019-09-07 09:31:36,813 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 73 [2019-09-07 09:31:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:36,813 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2019-09-07 09:31:36,813 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:31:36,814 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2019-09-07 09:31:36,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-07 09:31:36,815 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:36,815 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:36,815 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:36,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:36,816 INFO L82 PathProgramCache]: Analyzing trace with hash -321904708, now seen corresponding path program 14 times [2019-09-07 09:31:36,816 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:36,816 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:36,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:36,817 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:31:36,817 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-09-07 09:31:36,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:36,933 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:36,945 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:31:36,985 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:31:36,986 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:36,987 INFO L256 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:31:36,989 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:37,154 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 09:31:37,160 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:37,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2019-09-07 09:31:37,161 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-07 09:31:37,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-07 09:31:37,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:31:37,162 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand 25 states. [2019-09-07 09:31:37,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:37,356 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2019-09-07 09:31:37,357 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-09-07 09:31:37,357 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 79 [2019-09-07 09:31:37,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:37,358 INFO L225 Difference]: With dead ends: 148 [2019-09-07 09:31:37,358 INFO L226 Difference]: Without dead ends: 93 [2019-09-07 09:31:37,359 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2019-09-07 09:31:37,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2019-09-07 09:31:37,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2019-09-07 09:31:37,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2019-09-07 09:31:37,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2019-09-07 09:31:37,365 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 79 [2019-09-07 09:31:37,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:37,365 INFO L475 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2019-09-07 09:31:37,365 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-07 09:31:37,366 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2019-09-07 09:31:37,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-09-07 09:31:37,367 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:37,367 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:37,367 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:37,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:37,367 INFO L82 PathProgramCache]: Analyzing trace with hash -776609706, now seen corresponding path program 15 times [2019-09-07 09:31:37,368 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:37,368 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:37,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:37,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:37,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:37,527 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-09-07 09:31:37,527 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:37,527 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:31:37,547 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:42,752 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 09:31:42,752 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:42,758 INFO L256 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 09:31:42,760 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:42,784 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2019-09-07 09:31:42,792 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:42,792 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 09:31:42,793 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 09:31:42,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 09:31:42,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:31:42,794 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand 15 states. [2019-09-07 09:31:42,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:42,874 INFO L93 Difference]: Finished difference Result 131 states and 137 transitions. [2019-09-07 09:31:42,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 09:31:42,875 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 85 [2019-09-07 09:31:42,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:42,876 INFO L225 Difference]: With dead ends: 131 [2019-09-07 09:31:42,876 INFO L226 Difference]: Without dead ends: 96 [2019-09-07 09:31:42,876 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 09:31:42,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-09-07 09:31:42,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 94. [2019-09-07 09:31:42,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2019-09-07 09:31:42,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2019-09-07 09:31:42,883 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 85 [2019-09-07 09:31:42,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:42,883 INFO L475 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2019-09-07 09:31:42,884 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 09:31:42,884 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2019-09-07 09:31:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-07 09:31:42,885 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:42,885 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:42,885 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:42,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:42,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1479919534, now seen corresponding path program 16 times [2019-09-07 09:31:42,886 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:42,886 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:42,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:42,887 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:42,887 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:42,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 09:31:43,075 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:43,075 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:31:43,106 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:43,164 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:31:43,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:31:43,167 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 09:31:43,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:31:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2019-09-07 09:31:43,411 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:31:43,411 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2019-09-07 09:31:43,412 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:31:43,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:31:43,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:31:43,413 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand 28 states. [2019-09-07 09:31:43,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:31:43,602 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2019-09-07 09:31:43,602 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 09:31:43,602 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 89 [2019-09-07 09:31:43,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:31:43,603 INFO L225 Difference]: With dead ends: 166 [2019-09-07 09:31:43,604 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 09:31:43,605 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:31:43,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 09:31:43,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2019-09-07 09:31:43,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-09-07 09:31:43,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2019-09-07 09:31:43,610 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 89 [2019-09-07 09:31:43,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:31:43,611 INFO L475 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2019-09-07 09:31:43,611 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:31:43,611 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2019-09-07 09:31:43,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-07 09:31:43,612 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:31:43,612 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:31:43,612 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:31:43,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:31:43,613 INFO L82 PathProgramCache]: Analyzing trace with hash 236204140, now seen corresponding path program 17 times [2019-09-07 09:31:43,613 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:31:43,613 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:31:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:43,615 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:31:43,615 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:31:43,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:31:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-09-07 09:31:43,783 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:31:43,795 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:31:43,815 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:32:55,631 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 09:32:55,631 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:32:55,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 09:32:55,668 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:32:55,879 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-09-07 09:32:55,899 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:32:55,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2019-09-07 09:32:55,899 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:32:55,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:32:55,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:32:55,901 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand 30 states. [2019-09-07 09:32:56,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:32:56,114 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2019-09-07 09:32:56,115 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 09:32:56,115 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 95 [2019-09-07 09:32:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:32:56,116 INFO L225 Difference]: With dead ends: 176 [2019-09-07 09:32:56,116 INFO L226 Difference]: Without dead ends: 109 [2019-09-07 09:32:56,117 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:32:56,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-07 09:32:56,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 106. [2019-09-07 09:32:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-09-07 09:32:56,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2019-09-07 09:32:56,121 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 95 [2019-09-07 09:32:56,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:32:56,121 INFO L475 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2019-09-07 09:32:56,121 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:32:56,121 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2019-09-07 09:32:56,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-09-07 09:32:56,122 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:32:56,123 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:32:56,123 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:32:56,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:32:56,123 INFO L82 PathProgramCache]: Analyzing trace with hash 214035718, now seen corresponding path program 18 times [2019-09-07 09:32:56,123 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:32:56,124 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:32:56,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:32:56,125 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:32:56,125 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:32:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:32:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-09-07 09:32:56,326 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:32:56,326 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:32:56,336 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:33:18,487 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 09:33:18,488 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:18,501 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 09:33:18,504 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 54 proven. 196 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2019-09-07 09:33:18,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:18,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2019-09-07 09:33:18,872 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 09:33:18,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 09:33:18,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 09:33:18,873 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand 36 states. [2019-09-07 09:33:19,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:19,555 INFO L93 Difference]: Finished difference Result 189 states and 200 transitions. [2019-09-07 09:33:19,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 09:33:19,556 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 101 [2019-09-07 09:33:19,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:19,557 INFO L225 Difference]: With dead ends: 189 [2019-09-07 09:33:19,557 INFO L226 Difference]: Without dead ends: 118 [2019-09-07 09:33:19,558 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=681, Invalid=2075, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 09:33:19,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-07 09:33:19,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2019-09-07 09:33:19,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-09-07 09:33:19,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2019-09-07 09:33:19,564 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 101 [2019-09-07 09:33:19,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:19,564 INFO L475 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2019-09-07 09:33:19,564 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 09:33:19,564 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2019-09-07 09:33:19,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2019-09-07 09:33:19,565 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:19,565 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:19,566 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1575275590, now seen corresponding path program 19 times [2019-09-07 09:33:19,566 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:19,566 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:19,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:19,567 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:19,567 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:19,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-09-07 09:33:19,785 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:19,786 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:19,801 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:19,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:19,857 INFO L256 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 09:33:19,859 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:19,883 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-09-07 09:33:19,895 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:19,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2019-09-07 09:33:19,896 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 09:33:19,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 09:33:19,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:33:19,897 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand 20 states. [2019-09-07 09:33:19,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:19,963 INFO L93 Difference]: Finished difference Result 200 states and 206 transitions. [2019-09-07 09:33:19,965 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 09:33:19,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 113 [2019-09-07 09:33:19,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:19,966 INFO L225 Difference]: With dead ends: 200 [2019-09-07 09:33:19,966 INFO L226 Difference]: Without dead ends: 121 [2019-09-07 09:33:19,967 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2019-09-07 09:33:19,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-09-07 09:33:19,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-09-07 09:33:19,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-09-07 09:33:19,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2019-09-07 09:33:19,973 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2019-09-07 09:33:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:19,974 INFO L475 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2019-09-07 09:33:19,974 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 09:33:19,974 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2019-09-07 09:33:19,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-07 09:33:19,975 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:19,975 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:19,975 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1147533608, now seen corresponding path program 20 times [2019-09-07 09:33:19,976 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:19,976 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:19,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:19,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:33:19,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:20,176 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 545 trivial. 0 not checked. [2019-09-07 09:33:20,177 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:20,177 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:20,188 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:33:20,259 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:33:20,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:20,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 09:33:20,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:20,581 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2019-09-07 09:33:20,595 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:20,596 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2019-09-07 09:33:20,596 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-07 09:33:20,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-07 09:33:20,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:33:20,598 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand 37 states. [2019-09-07 09:33:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:20,857 INFO L93 Difference]: Finished difference Result 208 states and 216 transitions. [2019-09-07 09:33:20,858 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-09-07 09:33:20,858 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 115 [2019-09-07 09:33:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:20,859 INFO L225 Difference]: With dead ends: 208 [2019-09-07 09:33:20,859 INFO L226 Difference]: Without dead ends: 129 [2019-09-07 09:33:20,861 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2019-09-07 09:33:20,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2019-09-07 09:33:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2019-09-07 09:33:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2019-09-07 09:33:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2019-09-07 09:33:20,868 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 115 [2019-09-07 09:33:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:20,869 INFO L475 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2019-09-07 09:33:20,869 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-07 09:33:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2019-09-07 09:33:20,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-09-07 09:33:20,872 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:20,872 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:20,872 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 2027127410, now seen corresponding path program 21 times [2019-09-07 09:33:20,873 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:20,873 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:20,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:20,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:20,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:21,195 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 613 trivial. 0 not checked. [2019-09-07 09:33:21,196 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:21,196 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:33:21,210 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:52,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-09-07 09:33:52,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:52,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:33:52,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:53,064 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 35 proven. 289 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-09-07 09:33:53,080 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:53,080 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 23 [2019-09-07 09:33:53,080 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 09:33:53,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 09:33:53,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=291, Unknown=0, NotChecked=0, Total=506 [2019-09-07 09:33:53,081 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand 23 states. [2019-09-07 09:33:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:53,537 INFO L93 Difference]: Finished difference Result 179 states and 185 transitions. [2019-09-07 09:33:53,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 09:33:53,538 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 121 [2019-09-07 09:33:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:53,539 INFO L225 Difference]: With dead ends: 179 [2019-09-07 09:33:53,540 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 09:33:53,542 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=594, Invalid=1046, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 09:33:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 09:33:53,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2019-09-07 09:33:53,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-09-07 09:33:53,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2019-09-07 09:33:53,553 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 121 [2019-09-07 09:33:53,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:53,554 INFO L475 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2019-09-07 09:33:53,554 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 09:33:53,554 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2019-09-07 09:33:53,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2019-09-07 09:33:53,557 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:53,557 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:53,558 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:53,558 INFO L82 PathProgramCache]: Analyzing trace with hash 2026572910, now seen corresponding path program 22 times [2019-09-07 09:33:53,558 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:53,559 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:53,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:53,561 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:53,561 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:53,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:33:53,905 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:53,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:33:53,928 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:53,990 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:33:53,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:33:53,992 INFO L256 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:33:53,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:33:54,025 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2019-09-07 09:33:54,030 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:33:54,030 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:33:54,030 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:33:54,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:33:54,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:33:54,031 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand 22 states. [2019-09-07 09:33:54,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:33:54,086 INFO L93 Difference]: Finished difference Result 220 states and 226 transitions. [2019-09-07 09:33:54,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:33:54,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 125 [2019-09-07 09:33:54,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:33:54,088 INFO L225 Difference]: With dead ends: 220 [2019-09-07 09:33:54,088 INFO L226 Difference]: Without dead ends: 133 [2019-09-07 09:33:54,089 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:33:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-09-07 09:33:54,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-09-07 09:33:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-09-07 09:33:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2019-09-07 09:33:54,097 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2019-09-07 09:33:54,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:33:54,097 INFO L475 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2019-09-07 09:33:54,097 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:33:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2019-09-07 09:33:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2019-09-07 09:33:54,098 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:33:54,099 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:33:54,099 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:33:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:33:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash 922755724, now seen corresponding path program 23 times [2019-09-07 09:33:54,099 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:33:54,099 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:33:54,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:54,101 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:33:54,101 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:33:54,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:33:54,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2019-09-07 09:33:54,385 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:33:54,385 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:33:54,395 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 09:36:00,058 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 09:36:00,059 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:36:00,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 09:36:00,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:36:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2019-09-07 09:36:00,188 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:36:00,188 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2019-09-07 09:36:00,188 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 09:36:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 09:36:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:36:00,189 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 22 states. [2019-09-07 09:36:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:36:00,340 INFO L93 Difference]: Finished difference Result 187 states and 193 transitions. [2019-09-07 09:36:00,341 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 09:36:00,341 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 127 [2019-09-07 09:36:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:36:00,342 INFO L225 Difference]: With dead ends: 187 [2019-09-07 09:36:00,342 INFO L226 Difference]: Without dead ends: 138 [2019-09-07 09:36:00,343 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2019-09-07 09:36:00,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-09-07 09:36:00,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2019-09-07 09:36:00,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2019-09-07 09:36:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2019-09-07 09:36:00,352 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 127 [2019-09-07 09:36:00,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:36:00,352 INFO L475 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2019-09-07 09:36:00,352 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 09:36:00,352 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2019-09-07 09:36:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-09-07 09:36:00,353 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:36:00,354 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:36:00,354 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:36:00,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:36:00,354 INFO L82 PathProgramCache]: Analyzing trace with hash -723320952, now seen corresponding path program 24 times [2019-09-07 09:36:00,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:36:00,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:36:00,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:00,356 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:36:00,356 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:36:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:36:00,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2019-09-07 09:36:00,625 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:36:00,625 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:36:00,655 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:35,651 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2019-09-07 09:37:35,651 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:35,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-07 09:37:35,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 37 proven. 361 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2019-09-07 09:37:36,258 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:36,258 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2019-09-07 09:37:36,259 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 09:37:36,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 09:37:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 09:37:36,261 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand 44 states. [2019-09-07 09:37:37,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:37,134 INFO L93 Difference]: Finished difference Result 237 states and 246 transitions. [2019-09-07 09:37:37,135 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 09:37:37,135 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 131 [2019-09-07 09:37:37,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:37,137 INFO L225 Difference]: With dead ends: 237 [2019-09-07 09:37:37,137 INFO L226 Difference]: Without dead ends: 146 [2019-09-07 09:37:37,141 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=966, Invalid=3066, Unknown=0, NotChecked=0, Total=4032 [2019-09-07 09:37:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-09-07 09:37:37,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2019-09-07 09:37:37,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-09-07 09:37:37,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2019-09-07 09:37:37,149 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 131 [2019-09-07 09:37:37,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:37,150 INFO L475 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2019-09-07 09:37:37,150 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 09:37:37,150 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2019-09-07 09:37:37,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2019-09-07 09:37:37,151 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:37,151 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:37,152 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:37,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:37,152 INFO L82 PathProgramCache]: Analyzing trace with hash -2031792064, now seen corresponding path program 25 times [2019-09-07 09:37:37,152 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:37,152 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:37,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:37,153 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:37,153 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 841 trivial. 0 not checked. [2019-09-07 09:37:37,496 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:37,496 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:37,508 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:37,564 INFO L256 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 09:37:37,567 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2019-09-07 09:37:38,249 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:38,249 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2019-09-07 09:37:38,250 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-07 09:37:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-07 09:37:38,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 09:37:38,252 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand 45 states. [2019-09-07 09:37:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:38,530 INFO L93 Difference]: Finished difference Result 248 states and 256 transitions. [2019-09-07 09:37:38,533 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-07 09:37:38,533 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 139 [2019-09-07 09:37:38,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:38,534 INFO L225 Difference]: With dead ends: 248 [2019-09-07 09:37:38,535 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 09:37:38,536 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 09:37:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 09:37:38,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2019-09-07 09:37:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2019-09-07 09:37:38,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2019-09-07 09:37:38,543 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 139 [2019-09-07 09:37:38,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:38,543 INFO L475 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2019-09-07 09:37:38,543 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-07 09:37:38,543 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2019-09-07 09:37:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2019-09-07 09:37:38,545 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:38,545 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:38,545 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:38,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1614078502, now seen corresponding path program 26 times [2019-09-07 09:37:38,546 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:38,546 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:38,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:38,547 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:37:38,547 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:38,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-07 09:37:38,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:38,914 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:38,955 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 09:37:39,046 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 09:37:39,046 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:37:39,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 09:37:39,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:37:39,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2019-09-07 09:37:39,630 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:37:39,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2019-09-07 09:37:39,631 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-07 09:37:39,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-07 09:37:39,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:37:39,633 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand 47 states. [2019-09-07 09:37:39,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:37:39,909 INFO L93 Difference]: Finished difference Result 258 states and 266 transitions. [2019-09-07 09:37:39,910 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-09-07 09:37:39,910 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 145 [2019-09-07 09:37:39,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:37:39,911 INFO L225 Difference]: With dead ends: 258 [2019-09-07 09:37:39,911 INFO L226 Difference]: Without dead ends: 159 [2019-09-07 09:37:39,913 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2019-09-07 09:37:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-07 09:37:39,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2019-09-07 09:37:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-09-07 09:37:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2019-09-07 09:37:39,920 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 145 [2019-09-07 09:37:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:37:39,920 INFO L475 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2019-09-07 09:37:39,920 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-07 09:37:39,921 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2019-09-07 09:37:39,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-09-07 09:37:39,922 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:37:39,922 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:37:39,922 INFO L418 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:37:39,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:37:39,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1140944908, now seen corresponding path program 27 times [2019-09-07 09:37:39,923 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:37:39,923 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:37:39,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:39,924 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:37:39,924 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:37:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:37:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1013 trivial. 0 not checked. [2019-09-07 09:37:40,232 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:37:40,232 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:37:40,245 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 09:39:42,956 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2019-09-07 09:39:42,956 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:39:42,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 40 conjunts are in the unsatisfiable core [2019-09-07 09:39:43,000 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:39:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 88 proven. 484 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2019-09-07 09:39:43,149 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:39:43,150 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 29] total 30 [2019-09-07 09:39:43,150 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:39:43,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:39:43,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:39:43,151 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand 30 states. [2019-09-07 09:39:43,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:39:43,791 INFO L93 Difference]: Finished difference Result 221 states and 229 transitions. [2019-09-07 09:39:43,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:39:43,791 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 151 [2019-09-07 09:39:43,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:39:43,792 INFO L225 Difference]: With dead ends: 221 [2019-09-07 09:39:43,792 INFO L226 Difference]: Without dead ends: 164 [2019-09-07 09:39:43,794 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1084, Invalid=1886, Unknown=0, NotChecked=0, Total=2970 [2019-09-07 09:39:43,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-09-07 09:39:43,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2019-09-07 09:39:43,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-09-07 09:39:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 167 transitions. [2019-09-07 09:39:43,802 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 167 transitions. Word has length 151 [2019-09-07 09:39:43,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:39:43,802 INFO L475 AbstractCegarLoop]: Abstraction has 164 states and 167 transitions. [2019-09-07 09:39:43,802 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:39:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 167 transitions. [2019-09-07 09:39:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2019-09-07 09:39:43,803 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:39:43,803 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:39:43,803 INFO L418 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:39:43,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:39:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash -14814228, now seen corresponding path program 28 times [2019-09-07 09:39:43,804 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:39:43,804 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:39:43,804 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:43,805 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:39:43,805 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:44,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2019-09-07 09:39:44,172 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:39:44,172 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:39:44,195 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:39:44,270 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 09:39:44,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:39:44,272 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:39:44,275 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:39:44,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1105 trivial. 0 not checked. [2019-09-07 09:39:44,813 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:39:44,813 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2019-09-07 09:39:44,813 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-07 09:39:44,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-07 09:39:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 09:39:44,814 INFO L87 Difference]: Start difference. First operand 164 states and 167 transitions. Second operand 51 states. [2019-09-07 09:39:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:39:45,180 INFO L93 Difference]: Finished difference Result 284 states and 292 transitions. [2019-09-07 09:39:45,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-09-07 09:39:45,185 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 159 [2019-09-07 09:39:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:39:45,186 INFO L225 Difference]: With dead ends: 284 [2019-09-07 09:39:45,186 INFO L226 Difference]: Without dead ends: 173 [2019-09-07 09:39:45,188 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=675, Invalid=1875, Unknown=0, NotChecked=0, Total=2550 [2019-09-07 09:39:45,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-07 09:39:45,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 170. [2019-09-07 09:39:45,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2019-09-07 09:39:45,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2019-09-07 09:39:45,197 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 159 [2019-09-07 09:39:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:39:45,197 INFO L475 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2019-09-07 09:39:45,197 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-07 09:39:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2019-09-07 09:39:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2019-09-07 09:39:45,198 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:39:45,199 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:39:45,199 INFO L418 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:39:45,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:39:45,200 INFO L82 PathProgramCache]: Analyzing trace with hash 762073222, now seen corresponding path program 29 times [2019-09-07 09:39:45,201 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:39:45,201 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:39:45,202 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:45,203 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:39:45,203 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:39:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:39:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-07 09:39:45,710 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:39:45,711 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:39:45,733 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:07,681 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2019-09-07 09:43:07,681 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:43:07,762 INFO L256 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 09:43:07,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:43:07,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1826 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-07 09:43:07,829 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:43:07,829 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-07 09:43:07,830 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 09:43:07,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 09:43:07,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:43:07,831 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand 28 states. [2019-09-07 09:43:07,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:43:07,937 INFO L93 Difference]: Finished difference Result 288 states and 294 transitions. [2019-09-07 09:43:07,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-07 09:43:07,939 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 165 [2019-09-07 09:43:07,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:43:07,940 INFO L225 Difference]: With dead ends: 288 [2019-09-07 09:43:07,941 INFO L226 Difference]: Without dead ends: 173 [2019-09-07 09:43:07,941 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2019-09-07 09:43:07,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2019-09-07 09:43:07,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2019-09-07 09:43:07,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-09-07 09:43:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2019-09-07 09:43:07,948 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 165 [2019-09-07 09:43:07,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:43:07,948 INFO L475 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2019-09-07 09:43:07,948 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 09:43:07,948 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2019-09-07 09:43:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2019-09-07 09:43:07,949 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:43:07,950 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:43:07,950 INFO L418 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:43:07,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:43:07,950 INFO L82 PathProgramCache]: Analyzing trace with hash 286814372, now seen corresponding path program 30 times [2019-09-07 09:43:07,950 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:43:07,951 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:43:07,951 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:07,951 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:43:07,952 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:43:07,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:43:08,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-07 09:43:08,297 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:43:08,297 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:43:08,313 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 09:46:01,857 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2019-09-07 09:46:01,857 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 09:46:01,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 09:46:01,922 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:02,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1875 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2019-09-07 09:46:02,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:02,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2019-09-07 09:46:02,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 09:46:02,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 09:46:02,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 09:46:02,510 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand 54 states. [2019-09-07 09:46:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:02,864 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2019-09-07 09:46:02,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 09:46:02,864 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 167 [2019-09-07 09:46:02,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:02,866 INFO L225 Difference]: With dead ends: 296 [2019-09-07 09:46:02,866 INFO L226 Difference]: Without dead ends: 181 [2019-09-07 09:46:02,867 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=755, Invalid=2107, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 09:46:02,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-09-07 09:46:02,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2019-09-07 09:46:02,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-09-07 09:46:02,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 181 transitions. [2019-09-07 09:46:02,874 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 181 transitions. Word has length 167 [2019-09-07 09:46:02,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:02,875 INFO L475 AbstractCegarLoop]: Abstraction has 178 states and 181 transitions. [2019-09-07 09:46:02,875 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 09:46:02,875 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 181 transitions. [2019-09-07 09:46:02,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2019-09-07 09:46:02,876 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:02,876 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:02,876 INFO L418 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:02,877 INFO L82 PathProgramCache]: Analyzing trace with hash -846191810, now seen corresponding path program 31 times [2019-09-07 09:46:02,877 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:02,877 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:02,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:02,878 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 09:46:02,878 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:02,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2019-09-07 09:46:03,352 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 09:46:03,353 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 09:46:03,379 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 09:46:03,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 09:46:03,458 INFO L256 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 09:46:03,462 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 09:46:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2028 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2019-09-07 09:46:03,510 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 09:46:03,510 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-07 09:46:03,511 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 09:46:03,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 09:46:03,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:46:03,512 INFO L87 Difference]: Start difference. First operand 178 states and 181 transitions. Second operand 30 states. [2019-09-07 09:46:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 09:46:03,609 INFO L93 Difference]: Finished difference Result 300 states and 306 transitions. [2019-09-07 09:46:03,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-07 09:46:03,609 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 173 [2019-09-07 09:46:03,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 09:46:03,611 INFO L225 Difference]: With dead ends: 300 [2019-09-07 09:46:03,611 INFO L226 Difference]: Without dead ends: 181 [2019-09-07 09:46:03,612 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2019-09-07 09:46:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-09-07 09:46:03,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2019-09-07 09:46:03,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2019-09-07 09:46:03,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2019-09-07 09:46:03,618 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 173 [2019-09-07 09:46:03,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 09:46:03,618 INFO L475 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2019-09-07 09:46:03,618 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 09:46:03,619 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2019-09-07 09:46:03,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2019-09-07 09:46:03,619 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 09:46:03,620 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 09:46:03,620 INFO L418 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 09:46:03,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 09:46:03,620 INFO L82 PathProgramCache]: Analyzing trace with hash 857818460, now seen corresponding path program 32 times [2019-09-07 09:46:03,620 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 09:46:03,621 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 09:46:03,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:03,621 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 09:46:03,621 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 09:46:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat