/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:11:42,370 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:11:42,376 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:11:42,406 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:11:42,406 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:11:42,408 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:11:42,410 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:11:42,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:11:42,417 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:11:42,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:11:42,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:11:42,423 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:11:42,424 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:11:42,426 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:11:42,428 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:11:42,431 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:11:42,433 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:11:42,435 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:11:42,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:11:42,443 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:11:42,446 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:11:42,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:11:42,451 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:11:42,453 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:11:42,458 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 11:11:42,459 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 11:11:42,459 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 11:11:42,461 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 11:11:42,462 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 11:11:42,464 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 11:11:42,464 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 11:11:42,466 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 11:11:42,468 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 11:11:42,469 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 11:11:42,472 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 11:11:42,472 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 11:11:42,474 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 11:11:42,474 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 11:11:42,474 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:11:42,477 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:11:42,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:11:42,480 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 [2020-07-20 11:11:42,509 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:11:42,510 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:11:42,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:11:42,517 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:11:42,517 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:11:42,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:11:42,517 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:11:42,517 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:11:42,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:11:42,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:11:42,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:11:42,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:11:42,518 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:11:42,519 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:11:42,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:11:42,519 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:11:42,521 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:11:42,521 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:11:42,522 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:11:42,522 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:11:42,522 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:11:42,522 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:11:42,523 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:11:42,523 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:11:42,523 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:11:42,524 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:11:42,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:42,524 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:11:42,524 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:11:42,525 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> NOT_INCREMENTALLY [2020-07-20 11:11:43,095 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:11:43,143 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:11:43,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:11:43,156 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:11:43,157 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:11:43,159 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-20 11:11:43,323 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a8228fd/55de2afcf78249449bfef9bd49a974a4/FLAG930522f31 [2020-07-20 11:11:44,138 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:11:44,140 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/fibo_2calls_8-1.c [2020-07-20 11:11:44,154 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a8228fd/55de2afcf78249449bfef9bd49a974a4/FLAG930522f31 [2020-07-20 11:11:44,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/36a8228fd/55de2afcf78249449bfef9bd49a974a4 [2020-07-20 11:11:44,489 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:11:44,494 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:11:44,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:11:44,497 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:11:44,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:11:44,506 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,512 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2097b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44, skipping insertion in model container [2020-07-20 11:11:44,513 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,526 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:11:44,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:11:44,811 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:11:44,830 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:11:44,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:11:44,900 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:11:44,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44 WrapperNode [2020-07-20 11:11:44,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:11:44,907 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:11:44,907 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:11:44,907 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:11:44,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,944 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,955 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (1/1) ... [2020-07-20 11:11:44,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:11:44,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:11:44,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:11:44,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:11:44,965 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (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 [2020-07-20 11:11:45,215 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:11:45,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:11:45,216 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-07-20 11:11:45,216 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-07-20 11:11:45,217 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:11:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:11:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:11:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-07-20 11:11:45,217 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-07-20 11:11:45,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:11:45,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:11:45,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:11:45,559 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:11:45,560 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:11:45,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:11:45 BoogieIcfgContainer [2020-07-20 11:11:45,570 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:11:45,572 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:11:45,573 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:11:45,581 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:11:45,582 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:11:44" (1/3) ... [2020-07-20 11:11:45,584 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c180b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:11:45, skipping insertion in model container [2020-07-20 11:11:45,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:11:44" (2/3) ... [2020-07-20 11:11:45,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c180b28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:11:45, skipping insertion in model container [2020-07-20 11:11:45,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:11:45" (3/3) ... [2020-07-20 11:11:45,590 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2020-07-20 11:11:45,618 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:11:45,654 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:11:45,699 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:11:45,768 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:11:45,769 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:11:45,769 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:11:45,769 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:11:45,770 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:11:45,770 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:11:45,770 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:11:45,770 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:11:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 11:11:45,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 11:11:45,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:45,830 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:45,831 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:45,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:45,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-07-20 11:11:45,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:45,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748252270] [2020-07-20 11:11:45,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:45,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:11:45,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:46,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:11:46,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:11:46,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748252270] [2020-07-20 11:11:46,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:11:46,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:11:46,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911642126] [2020-07-20 11:11:46,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:11:46,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:46,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:11:46,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:11:46,152 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-07-20 11:11:46,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:46,369 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-07-20 11:11:46,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:11:46,374 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 11:11:46,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:46,404 INFO L225 Difference]: With dead ends: 44 [2020-07-20 11:11:46,405 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 11:11:46,412 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:11:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 11:11:46,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 11:11:46,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:11:46,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:11:46,503 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-07-20 11:11:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:46,505 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:11:46,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:11:46,505 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:11:46,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-07-20 11:11:46,510 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:46,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:46,724 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:46,725 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:46,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:46,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-07-20 11:11:46,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:46,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562723717] [2020-07-20 11:11:46,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:46,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-07-20 11:11:46,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:46,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 11:11:46,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:11:46,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562723717] [2020-07-20 11:11:46,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:11:46,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 11:11:46,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724815098] [2020-07-20 11:11:46,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 11:11:46,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:46,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 11:11:46,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 11:11:46,860 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-07-20 11:11:46,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:46,991 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-07-20 11:11:46,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 11:11:46,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-07-20 11:11:46,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:46,995 INFO L225 Difference]: With dead ends: 36 [2020-07-20 11:11:46,996 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 11:11:46,999 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:11:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 11:11:47,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-07-20 11:11:47,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 11:11:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-07-20 11:11:47,015 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-07-20 11:11:47,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:47,015 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-07-20 11:11:47,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 11:11:47,016 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-07-20 11:11:47,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 11:11:47,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:47,019 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:47,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:47,235 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:47,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:47,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-07-20 11:11:47,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:47,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19472082] [2020-07-20 11:11:47,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:11:47,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:11:47,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:47,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:48,000 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:11:48,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19472082] [2020-07-20 11:11:48,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:48,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:11:48,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870230861] [2020-07-20 11:11:48,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:11:48,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:48,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:11:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:11:48,145 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 10 states. [2020-07-20 11:11:48,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:48,368 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2020-07-20 11:11:48,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:11:48,370 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-07-20 11:11:48,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:48,373 INFO L225 Difference]: With dead ends: 41 [2020-07-20 11:11:48,373 INFO L226 Difference]: Without dead ends: 37 [2020-07-20 11:11:48,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:11:48,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-07-20 11:11:48,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2020-07-20 11:11:48,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:11:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:11:48,390 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 26 [2020-07-20 11:11:48,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:48,391 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:11:48,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:11:48,391 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:11:48,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 11:11:48,394 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:48,394 INFO L422 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, 1, 1] [2020-07-20 11:11:48,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:48,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-07-20 11:11:48,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:48,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699719105] [2020-07-20 11:11:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:48,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:48,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 11:11:48,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:11:48,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:48,993 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:48,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:49,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 11:11:49,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699719105] [2020-07-20 11:11:49,060 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:49,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-07-20 11:11:49,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479744505] [2020-07-20 11:11:49,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:11:49,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:49,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:11:49,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-07-20 11:11:49,064 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 10 states. [2020-07-20 11:11:49,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:49,319 INFO L93 Difference]: Finished difference Result 46 states and 62 transitions. [2020-07-20 11:11:49,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 11:11:49,320 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-07-20 11:11:49,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:49,322 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:11:49,322 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 11:11:49,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:11:49,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 11:11:49,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-20 11:11:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-20 11:11:49,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-07-20 11:11:49,339 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 27 [2020-07-20 11:11:49,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:49,340 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-07-20 11:11:49,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:11:49,340 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-07-20 11:11:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-07-20 11:11:49,344 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:49,344 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:49,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:49,561 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:49,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:49,562 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-07-20 11:11:49,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:49,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683665263] [2020-07-20 11:11:49,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:49,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:11:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-07-20 11:11:49,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:50,110 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:50,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:50,209 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:50,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:11:50,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683665263] [2020-07-20 11:11:50,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:50,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:11:50,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390950123] [2020-07-20 11:11:50,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:11:50,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:50,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:11:50,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:11:50,330 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 12 states. [2020-07-20 11:11:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:50,679 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2020-07-20 11:11:50,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:11:50,681 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 39 [2020-07-20 11:11:50,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:50,687 INFO L225 Difference]: With dead ends: 51 [2020-07-20 11:11:50,690 INFO L226 Difference]: Without dead ends: 47 [2020-07-20 11:11:50,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:11:50,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-07-20 11:11:50,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2020-07-20 11:11:50,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:11:50,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:11:50,720 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 39 [2020-07-20 11:11:50,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:50,721 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:11:50,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:11:50,722 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:11:50,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-20 11:11:50,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:50,725 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:50,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:50,931 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:50,932 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-07-20 11:11:50,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:50,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964285050] [2020-07-20 11:11:50,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:50,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 11:11:50,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:51,078 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-07-20 11:11:51,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:51,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:51,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:51,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:11:51,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964285050] [2020-07-20 11:11:51,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:51,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2020-07-20 11:11:51,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349648971] [2020-07-20 11:11:51,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 11:11:51,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:51,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 11:11:51,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-07-20 11:11:51,509 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 12 states. [2020-07-20 11:11:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:51,743 INFO L93 Difference]: Finished difference Result 56 states and 84 transitions. [2020-07-20 11:11:51,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 11:11:51,751 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 40 [2020-07-20 11:11:51,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:51,753 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:11:51,755 INFO L226 Difference]: Without dead ends: 52 [2020-07-20 11:11:51,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:11:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-07-20 11:11:51,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-07-20 11:11:51,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:11:51,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 54 transitions. [2020-07-20 11:11:51,786 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 54 transitions. Word has length 40 [2020-07-20 11:11:51,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:51,787 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 54 transitions. [2020-07-20 11:11:51,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 11:11:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 54 transitions. [2020-07-20 11:11:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-07-20 11:11:51,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:51,800 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:52,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:52,002 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:52,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:52,003 INFO L82 PathProgramCache]: Analyzing trace with hash -209212298, now seen corresponding path program 2 times [2020-07-20 11:11:52,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:52,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573764316] [2020-07-20 11:11:52,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:52,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:52,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:11:52,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-07-20 11:11:52,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:52,566 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:52,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:52,728 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:52,816 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:52,891 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:11:52,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573764316] [2020-07-20 11:11:52,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:52,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:11:52,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691366677] [2020-07-20 11:11:52,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:11:52,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:52,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:11:52,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:11:52,900 INFO L87 Difference]: Start difference. First operand 40 states and 54 transitions. Second operand 14 states. [2020-07-20 11:11:53,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:53,206 INFO L93 Difference]: Finished difference Result 61 states and 96 transitions. [2020-07-20 11:11:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:11:53,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2020-07-20 11:11:53,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:53,216 INFO L225 Difference]: With dead ends: 61 [2020-07-20 11:11:53,217 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 11:11:53,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:11:53,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 11:11:53,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-20 11:11:53,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:11:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:11:53,259 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 52 [2020-07-20 11:11:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:53,260 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:11:53,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:11:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:11:53,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-07-20 11:11:53,272 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:53,272 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:53,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:53,474 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:53,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:53,475 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-07-20 11:11:53,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:53,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697868003] [2020-07-20 11:11:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:53,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:53,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:11:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:53,635 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-07-20 11:11:53,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:54,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:54,059 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:54,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:54,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:54,257 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-07-20 11:11:54,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697868003] [2020-07-20 11:11:54,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:54,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 14 [2020-07-20 11:11:54,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95771337] [2020-07-20 11:11:54,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 11:11:54,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:54,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 11:11:54,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-07-20 11:11:54,321 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 14 states. [2020-07-20 11:11:54,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:54,610 INFO L93 Difference]: Finished difference Result 66 states and 110 transitions. [2020-07-20 11:11:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:11:54,611 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-07-20 11:11:54,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:54,614 INFO L225 Difference]: With dead ends: 66 [2020-07-20 11:11:54,615 INFO L226 Difference]: Without dead ends: 62 [2020-07-20 11:11:54,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 8 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:11:54,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-07-20 11:11:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-07-20 11:11:54,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 11:11:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 64 transitions. [2020-07-20 11:11:54,634 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 64 transitions. Word has length 54 [2020-07-20 11:11:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:54,635 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 64 transitions. [2020-07-20 11:11:54,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 11:11:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 64 transitions. [2020-07-20 11:11:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-07-20 11:11:54,638 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:54,638 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:54,853 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:54,855 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:54,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:54,856 INFO L82 PathProgramCache]: Analyzing trace with hash -975547772, now seen corresponding path program 3 times [2020-07-20 11:11:54,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:54,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382906283] [2020-07-20 11:11:54,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:54,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:11:54,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-07-20 11:11:55,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:55,885 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:55,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:56,067 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:56,190 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:56,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:56,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:56,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:56,315 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 68 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-07-20 11:11:56,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382906283] [2020-07-20 11:11:56,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:56,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 11:11:56,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226530772] [2020-07-20 11:11:56,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:11:56,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:56,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:11:56,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:11:56,323 INFO L87 Difference]: Start difference. First operand 45 states and 64 transitions. Second operand 16 states. [2020-07-20 11:11:56,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:56,724 INFO L93 Difference]: Finished difference Result 71 states and 124 transitions. [2020-07-20 11:11:56,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:11:56,725 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2020-07-20 11:11:56,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:56,727 INFO L225 Difference]: With dead ends: 71 [2020-07-20 11:11:56,728 INFO L226 Difference]: Without dead ends: 67 [2020-07-20 11:11:56,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:11:56,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-07-20 11:11:56,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-07-20 11:11:56,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:11:56,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:11:56,748 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 78 [2020-07-20 11:11:56,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:56,749 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:11:56,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:11:56,749 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:11:56,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-07-20 11:11:56,752 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:56,752 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:56,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:56,968 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:56,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:56,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1891337214, now seen corresponding path program 2 times [2020-07-20 11:11:56,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:56,971 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631919071] [2020-07-20 11:11:56,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:57,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:57,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:11:57,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:57,245 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2020-07-20 11:11:57,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:11:57,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:58,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:58,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:58,302 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:11:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 17 proven. 125 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 11:11:58,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631919071] [2020-07-20 11:11:58,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:11:58,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 16 [2020-07-20 11:11:58,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959170012] [2020-07-20 11:11:58,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 11:11:58,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:11:58,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 11:11:58,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-07-20 11:11:58,400 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 16 states. [2020-07-20 11:11:58,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:11:58,787 INFO L93 Difference]: Finished difference Result 76 states and 140 transitions. [2020-07-20 11:11:58,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:11:58,788 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 108 [2020-07-20 11:11:58,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:11:58,792 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:11:58,793 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 11:11:58,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 192 SyntacticMatches, 10 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:11:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 11:11:58,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-07-20 11:11:58,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-07-20 11:11:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 75 transitions. [2020-07-20 11:11:58,853 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 75 transitions. Word has length 108 [2020-07-20 11:11:58,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:11:58,858 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 75 transitions. [2020-07-20 11:11:58,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 11:11:58,858 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 75 transitions. [2020-07-20 11:11:58,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-20 11:11:58,864 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:11:58,865 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 12, 9, 9, 9, 9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:11:59,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:59,067 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:11:59,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:11:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash -815433282, now seen corresponding path program 4 times [2020-07-20 11:11:59,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:11:59,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735343028] [2020-07-20 11:11:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:11:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:11:59,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:11:59,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:11:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 332 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-07-20 11:11:59,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:00,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,133 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,297 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,472 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,473 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:01,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 47 proven. 346 refuted. 0 times theorem prover too weak. 786 trivial. 0 not checked. [2020-07-20 11:12:01,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735343028] [2020-07-20 11:12:01,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:01,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 11:12:01,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556522769] [2020-07-20 11:12:01,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:12:01,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:01,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:12:01,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:12:01,583 INFO L87 Difference]: Start difference. First operand 50 states and 75 transitions. Second operand 18 states. [2020-07-20 11:12:01,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:01,968 INFO L93 Difference]: Finished difference Result 81 states and 156 transitions. [2020-07-20 11:12:01,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:12:01,970 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 208 [2020-07-20 11:12:01,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:01,974 INFO L225 Difference]: With dead ends: 81 [2020-07-20 11:12:01,974 INFO L226 Difference]: Without dead ends: 77 [2020-07-20 11:12:01,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 389 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:12:01,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-07-20 11:12:01,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-07-20 11:12:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:12:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 11:12:01,993 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 208 [2020-07-20 11:12:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:01,994 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 11:12:01,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:12:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 11:12:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 11:12:01,997 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:01,998 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:02,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:02,212 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1180347891, now seen corresponding path program 2 times [2020-07-20 11:12:02,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:02,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222620328] [2020-07-20 11:12:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:02,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:12:02,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:02,441 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 149 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2020-07-20 11:12:02,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:03,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:03,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:03,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:04,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:04,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:04,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:04,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 24 proven. 165 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2020-07-20 11:12:04,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222620328] [2020-07-20 11:12:04,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:04,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 18 [2020-07-20 11:12:04,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091287736] [2020-07-20 11:12:04,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 11:12:04,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:04,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 11:12:04,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-07-20 11:12:04,301 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 18 states. [2020-07-20 11:12:04,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:04,761 INFO L93 Difference]: Finished difference Result 86 states and 174 transitions. [2020-07-20 11:12:04,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:12:04,769 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 121 [2020-07-20 11:12:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:04,772 INFO L225 Difference]: With dead ends: 86 [2020-07-20 11:12:04,773 INFO L226 Difference]: Without dead ends: 82 [2020-07-20 11:12:04,774 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 214 SyntacticMatches, 12 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2020-07-20 11:12:04,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-07-20 11:12:04,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 55. [2020-07-20 11:12:04,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-07-20 11:12:04,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 87 transitions. [2020-07-20 11:12:04,791 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 87 transitions. Word has length 121 [2020-07-20 11:12:04,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:04,792 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 87 transitions. [2020-07-20 11:12:04,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 11:12:04,793 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 87 transitions. [2020-07-20 11:12:04,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-07-20 11:12:04,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:04,797 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 11, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:05,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:05,014 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:05,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:05,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2099307065, now seen corresponding path program 5 times [2020-07-20 11:12:05,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:05,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203577233] [2020-07-20 11:12:05,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:05,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:12:05,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 331 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2020-07-20 11:12:05,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:07,192 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:07,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:07,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,003 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,298 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,356 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:08,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1023 backedges. 62 proven. 352 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2020-07-20 11:12:08,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203577233] [2020-07-20 11:12:08,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:08,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 11:12:08,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948179436] [2020-07-20 11:12:08,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:12:08,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:12:08,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:12:08,437 INFO L87 Difference]: Start difference. First operand 55 states and 87 transitions. Second operand 20 states. [2020-07-20 11:12:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:08,982 INFO L93 Difference]: Finished difference Result 91 states and 192 transitions. [2020-07-20 11:12:08,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:12:08,983 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 195 [2020-07-20 11:12:08,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:08,987 INFO L225 Difference]: With dead ends: 91 [2020-07-20 11:12:08,987 INFO L226 Difference]: Without dead ends: 87 [2020-07-20 11:12:08,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 359 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:12:08,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-20 11:12:09,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2020-07-20 11:12:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:12:09,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 11:12:09,007 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 195 [2020-07-20 11:12:09,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:09,008 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 11:12:09,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:12:09,009 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 11:12:09,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-07-20 11:12:09,013 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:09,013 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 12, 12, 12, 8, 8, 8, 8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:09,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:09,228 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:09,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:09,229 INFO L82 PathProgramCache]: Analyzing trace with hash 266210309, now seen corresponding path program 3 times [2020-07-20 11:12:09,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:09,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995550553] [2020-07-20 11:12:09,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:09,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:12:09,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:09,566 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 347 refuted. 0 times theorem prover too weak. 658 trivial. 0 not checked. [2020-07-20 11:12:09,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:11,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:11,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:11,986 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:12,409 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:12,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:12,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:12,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:12,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:12,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 69 proven. 371 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 11:12:12,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995550553] [2020-07-20 11:12:12,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:12,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:12:12,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799473595] [2020-07-20 11:12:12,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:12:12,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:12,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:12:12,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:12:12,853 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 19 states. [2020-07-20 11:12:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:13,528 INFO L93 Difference]: Finished difference Result 96 states and 212 transitions. [2020-07-20 11:12:13,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:12:13,529 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 201 [2020-07-20 11:12:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:13,542 INFO L225 Difference]: With dead ends: 96 [2020-07-20 11:12:13,542 INFO L226 Difference]: Without dead ends: 92 [2020-07-20 11:12:13,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 370 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:12:13,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-07-20 11:12:13,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-07-20 11:12:13,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 11:12:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 100 transitions. [2020-07-20 11:12:13,575 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 100 transitions. Word has length 201 [2020-07-20 11:12:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:13,577 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 100 transitions. [2020-07-20 11:12:13,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:12:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 100 transitions. [2020-07-20 11:12:13,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-07-20 11:12:13,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:13,585 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 22, 21, 21, 16, 16, 16, 16, 16, 16, 16, 16, 10, 10, 10, 10, 10, 10, 10, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:13,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:13,798 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash -865443995, now seen corresponding path program 6 times [2020-07-20 11:12:13,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:13,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099055868] [2020-07-20 11:12:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:14,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 784 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:12:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 819 refuted. 0 times theorem prover too weak. 2713 trivial. 0 not checked. [2020-07-20 11:12:14,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:16,923 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:16,925 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:17,813 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:17,815 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,883 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:18,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:19,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3649 backedges. 117 proven. 849 refuted. 0 times theorem prover too weak. 2683 trivial. 0 not checked. [2020-07-20 11:12:19,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099055868] [2020-07-20 11:12:19,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:19,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:12:19,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119969808] [2020-07-20 11:12:19,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:12:19,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:19,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:12:19,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:12:19,171 INFO L87 Difference]: Start difference. First operand 60 states and 100 transitions. Second operand 21 states. [2020-07-20 11:12:19,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:19,939 INFO L93 Difference]: Finished difference Result 101 states and 232 transitions. [2020-07-20 11:12:19,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:12:19,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 351 [2020-07-20 11:12:19,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:19,946 INFO L225 Difference]: With dead ends: 101 [2020-07-20 11:12:19,946 INFO L226 Difference]: Without dead ends: 97 [2020-07-20 11:12:19,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 667 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:12:19,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-07-20 11:12:19,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 65. [2020-07-20 11:12:19,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-07-20 11:12:19,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 114 transitions. [2020-07-20 11:12:19,985 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 114 transitions. Word has length 351 [2020-07-20 11:12:19,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:19,986 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 114 transitions. [2020-07-20 11:12:19,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:12:19,987 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 114 transitions. [2020-07-20 11:12:19,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2020-07-20 11:12:19,993 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:19,993 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 19, 17, 17, 13, 13, 13, 13, 13, 13, 13, 13, 11, 8, 8, 8, 8, 8, 8, 8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:20,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:20,207 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:20,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:20,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1494010988, now seen corresponding path program 3 times [2020-07-20 11:12:20,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:20,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317848354] [2020-07-20 11:12:20,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:20,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:12:20,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:20,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 533 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2020-07-20 11:12:20,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:22,686 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:22,690 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:23,400 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:23,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:23,779 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:23,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:24,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:24,258 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:24,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:24,418 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2517 backedges. 124 proven. 554 refuted. 0 times theorem prover too weak. 1839 trivial. 0 not checked. [2020-07-20 11:12:24,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317848354] [2020-07-20 11:12:24,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:24,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:12:24,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056409445] [2020-07-20 11:12:24,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:12:24,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:24,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:12:24,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:12:24,655 INFO L87 Difference]: Start difference. First operand 65 states and 114 transitions. Second operand 19 states. [2020-07-20 11:12:25,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:25,335 INFO L93 Difference]: Finished difference Result 129 states and 362 transitions. [2020-07-20 11:12:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:12:25,336 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 297 [2020-07-20 11:12:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:25,341 INFO L225 Difference]: With dead ends: 129 [2020-07-20 11:12:25,341 INFO L226 Difference]: Without dead ends: 125 [2020-07-20 11:12:25,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 562 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:12:25,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-07-20 11:12:25,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 67. [2020-07-20 11:12:25,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 11:12:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 120 transitions. [2020-07-20 11:12:25,388 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 120 transitions. Word has length 297 [2020-07-20 11:12:25,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:25,391 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 120 transitions. [2020-07-20 11:12:25,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:12:25,392 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 120 transitions. [2020-07-20 11:12:25,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-20 11:12:25,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:25,396 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 25, 25, 25, 23, 17, 17, 17, 17, 17, 17, 17, 12, 12, 12, 12, 12, 12, 12, 11, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:25,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:25,611 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:25,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:25,612 INFO L82 PathProgramCache]: Analyzing trace with hash -948476032, now seen corresponding path program 1 times [2020-07-20 11:12:25,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:25,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182855474] [2020-07-20 11:12:25,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:25,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:12:25,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:26,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 707 refuted. 0 times theorem prover too weak. 3930 trivial. 0 not checked. [2020-07-20 11:12:26,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:27,977 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:28,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:28,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:29,032 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:29,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:29,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:29,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4805 backedges. 168 proven. 723 refuted. 0 times theorem prover too weak. 3914 trivial. 0 not checked. [2020-07-20 11:12:29,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182855474] [2020-07-20 11:12:29,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:29,604 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:12:29,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468366015] [2020-07-20 11:12:29,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:12:29,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:12:29,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:12:29,610 INFO L87 Difference]: Start difference. First operand 67 states and 120 transitions. Second operand 17 states. [2020-07-20 11:12:30,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:30,365 INFO L93 Difference]: Finished difference Result 139 states and 413 transitions. [2020-07-20 11:12:30,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:12:30,366 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 409 [2020-07-20 11:12:30,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:30,372 INFO L225 Difference]: With dead ends: 139 [2020-07-20 11:12:30,373 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 11:12:30,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 790 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:12:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 11:12:30,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 69. [2020-07-20 11:12:30,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 11:12:30,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 127 transitions. [2020-07-20 11:12:30,408 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 127 transitions. Word has length 409 [2020-07-20 11:12:30,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:30,409 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 127 transitions. [2020-07-20 11:12:30,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:12:30,410 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 127 transitions. [2020-07-20 11:12:30,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2020-07-20 11:12:30,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:30,419 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 33, 33, 32, 30, 22, 22, 22, 22, 22, 22, 22, 16, 16, 16, 16, 16, 16, 16, 14, 14, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:30,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:30,634 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash -1385064961, now seen corresponding path program 1 times [2020-07-20 11:12:30,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:30,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11981334] [2020-07-20 11:12:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:31,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:31,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:12:31,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 323 proven. 1219 refuted. 0 times theorem prover too weak. 6689 trivial. 0 not checked. [2020-07-20 11:12:31,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:34,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:35,489 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:36,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:36,617 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:36,814 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:36,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:36,938 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:37,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:37,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:37,338 INFO L134 CoverageAnalysis]: Checked inductivity of 8231 backedges. 327 proven. 1245 refuted. 0 times theorem prover too weak. 6659 trivial. 0 not checked. [2020-07-20 11:12:37,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11981334] [2020-07-20 11:12:37,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:37,340 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:12:37,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178350775] [2020-07-20 11:12:37,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:12:37,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:37,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:12:37,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:12:37,344 INFO L87 Difference]: Start difference. First operand 69 states and 127 transitions. Second operand 21 states. [2020-07-20 11:12:38,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:38,521 INFO L93 Difference]: Finished difference Result 166 states and 566 transitions. [2020-07-20 11:12:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:12:38,523 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 531 [2020-07-20 11:12:38,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:38,529 INFO L225 Difference]: With dead ends: 166 [2020-07-20 11:12:38,529 INFO L226 Difference]: Without dead ends: 88 [2020-07-20 11:12:38,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1069 GetRequests, 1025 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:12:38,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-20 11:12:38,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-20 11:12:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-20 11:12:38,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 146 transitions. [2020-07-20 11:12:38,576 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 146 transitions. Word has length 531 [2020-07-20 11:12:38,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:38,581 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 146 transitions. [2020-07-20 11:12:38,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:12:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 146 transitions. [2020-07-20 11:12:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-07-20 11:12:38,590 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:38,590 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 25, 24, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:38,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:38,806 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:38,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:38,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1214630406, now seen corresponding path program 2 times [2020-07-20 11:12:38,808 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:38,808 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592174987] [2020-07-20 11:12:38,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:39,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:12:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:39,480 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 884 refuted. 0 times theorem prover too weak. 4840 trivial. 0 not checked. [2020-07-20 11:12:39,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:41,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:41,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:42,559 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:43,072 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:43,074 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:43,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:43,605 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:43,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:43,788 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 5956 backedges. 232 proven. 905 refuted. 0 times theorem prover too weak. 4819 trivial. 0 not checked. [2020-07-20 11:12:43,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592174987] [2020-07-20 11:12:43,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:43,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:12:43,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539962412] [2020-07-20 11:12:43,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:12:43,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:43,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:12:43,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:12:43,943 INFO L87 Difference]: Start difference. First operand 88 states and 146 transitions. Second operand 19 states. [2020-07-20 11:12:44,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:44,779 INFO L93 Difference]: Finished difference Result 167 states and 414 transitions. [2020-07-20 11:12:44,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:12:44,781 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 458 [2020-07-20 11:12:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:44,788 INFO L225 Difference]: With dead ends: 167 [2020-07-20 11:12:44,789 INFO L226 Difference]: Without dead ends: 153 [2020-07-20 11:12:44,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 883 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:12:44,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-07-20 11:12:44,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 94. [2020-07-20 11:12:44,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-07-20 11:12:44,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 160 transitions. [2020-07-20 11:12:44,820 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 160 transitions. Word has length 458 [2020-07-20 11:12:44,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:44,821 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 160 transitions. [2020-07-20 11:12:44,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:12:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 160 transitions. [2020-07-20 11:12:44,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2020-07-20 11:12:44,828 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:44,828 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 25, 25, 23, 19, 14, 14, 14, 14, 14, 14, 14, 12, 12, 12, 12, 12, 12, 12, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:45,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:45,045 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:45,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:45,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1610364731, now seen corresponding path program 3 times [2020-07-20 11:12:45,047 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:45,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155329599] [2020-07-20 11:12:45,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:45,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:12:45,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:45,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 283 proven. 715 refuted. 0 times theorem prover too weak. 2766 trivial. 0 not checked. [2020-07-20 11:12:45,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:48,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:48,784 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:49,667 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:49,668 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:50,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:50,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:50,622 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:50,623 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:50,948 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:50,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:51,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:51,127 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:51,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:51,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:51,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:51,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3764 backedges. 285 proven. 743 refuted. 0 times theorem prover too weak. 2736 trivial. 0 not checked. [2020-07-20 11:12:51,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155329599] [2020-07-20 11:12:51,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:51,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:12:51,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673514502] [2020-07-20 11:12:51,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:12:51,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:51,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:12:51,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:12:51,562 INFO L87 Difference]: Start difference. First operand 94 states and 160 transitions. Second operand 21 states. [2020-07-20 11:12:52,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:52,537 INFO L93 Difference]: Finished difference Result 191 states and 508 transitions. [2020-07-20 11:12:52,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:12:52,538 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 367 [2020-07-20 11:12:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:52,542 INFO L225 Difference]: With dead ends: 191 [2020-07-20 11:12:52,543 INFO L226 Difference]: Without dead ends: 105 [2020-07-20 11:12:52,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 741 GetRequests, 697 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:12:52,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-07-20 11:12:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 99. [2020-07-20 11:12:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 11:12:52,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 171 transitions. [2020-07-20 11:12:52,565 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 171 transitions. Word has length 367 [2020-07-20 11:12:52,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:52,566 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 171 transitions. [2020-07-20 11:12:52,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:12:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 171 transitions. [2020-07-20 11:12:52,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2020-07-20 11:12:52,572 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:52,572 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 25, 21, 21, 15, 15, 15, 15, 15, 15, 15, 12, 12, 12, 12, 12, 12, 12, 9, 9, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:52,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:52,787 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:52,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:52,788 INFO L82 PathProgramCache]: Analyzing trace with hash -390845590, now seen corresponding path program 4 times [2020-07-20 11:12:52,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:52,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784860087] [2020-07-20 11:12:52,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:53,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:53,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:12:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:53,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 186 proven. 611 refuted. 0 times theorem prover too weak. 3247 trivial. 0 not checked. [2020-07-20 11:12:53,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:12:55,401 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:55,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:55,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:56,239 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:56,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:56,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:56,465 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:56,466 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:56,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:12:56,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4044 backedges. 186 proven. 627 refuted. 0 times theorem prover too weak. 3231 trivial. 0 not checked. [2020-07-20 11:12:56,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784860087] [2020-07-20 11:12:56,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:12:56,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:12:56,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135568393] [2020-07-20 11:12:56,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:12:56,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:12:56,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:12:56,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:12:56,778 INFO L87 Difference]: Start difference. First operand 99 states and 171 transitions. Second operand 17 states. [2020-07-20 11:12:57,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:12:57,267 INFO L93 Difference]: Finished difference Result 178 states and 428 transitions. [2020-07-20 11:12:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:12:57,269 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 379 [2020-07-20 11:12:57,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:12:57,274 INFO L225 Difference]: With dead ends: 178 [2020-07-20 11:12:57,275 INFO L226 Difference]: Without dead ends: 163 [2020-07-20 11:12:57,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 729 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:12:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-07-20 11:12:57,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 106. [2020-07-20 11:12:57,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-07-20 11:12:57,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 192 transitions. [2020-07-20 11:12:57,303 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 192 transitions. Word has length 379 [2020-07-20 11:12:57,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:12:57,304 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 192 transitions. [2020-07-20 11:12:57,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:12:57,304 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 192 transitions. [2020-07-20 11:12:57,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-07-20 11:12:57,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:12:57,311 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 21, 20, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:12:57,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:57,527 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:12:57,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:12:57,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1482231414, now seen corresponding path program 5 times [2020-07-20 11:12:57,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:12:57,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171254458] [2020-07-20 11:12:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:12:57,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:12:57,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:12:57,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:12:58,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 237 proven. 729 refuted. 0 times theorem prover too weak. 3590 trivial. 0 not checked. [2020-07-20 11:12:58,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:00,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:00,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:01,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:01,565 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:01,982 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:01,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:02,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:02,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:02,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:02,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:02,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4556 backedges. 239 proven. 748 refuted. 0 times theorem prover too weak. 3569 trivial. 0 not checked. [2020-07-20 11:13:02,671 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171254458] [2020-07-20 11:13:02,671 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:02,671 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:13:02,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309479131] [2020-07-20 11:13:02,672 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:13:02,672 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:02,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:13:02,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:02,673 INFO L87 Difference]: Start difference. First operand 106 states and 192 transitions. Second operand 19 states. [2020-07-20 11:13:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:03,420 INFO L93 Difference]: Finished difference Result 172 states and 408 transitions. [2020-07-20 11:13:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:13:03,426 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 402 [2020-07-20 11:13:03,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:03,434 INFO L225 Difference]: With dead ends: 172 [2020-07-20 11:13:03,435 INFO L226 Difference]: Without dead ends: 157 [2020-07-20 11:13:03,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 810 GetRequests, 771 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:13:03,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-07-20 11:13:03,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 109. [2020-07-20 11:13:03,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 11:13:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 11:13:03,473 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 402 [2020-07-20 11:13:03,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:03,474 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 11:13:03,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:13:03,475 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 11:13:03,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-20 11:13:03,484 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:03,484 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 27, 23, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:03,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:03,699 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:03,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:03,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1545328541, now seen corresponding path program 6 times [2020-07-20 11:13:03,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:03,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297189513] [2020-07-20 11:13:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:04,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:04,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 244 proven. 693 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-20 11:13:04,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:06,416 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:06,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:06,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:07,484 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:07,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:07,684 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:07,740 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:07,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:08,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5660 backedges. 244 proven. 707 refuted. 0 times theorem prover too weak. 4709 trivial. 0 not checked. [2020-07-20 11:13:08,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297189513] [2020-07-20 11:13:08,001 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:08,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:13:08,002 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699774158] [2020-07-20 11:13:08,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:13:08,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:08,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:13:08,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:13:08,005 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-20 11:13:08,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:08,570 INFO L93 Difference]: Finished difference Result 190 states and 442 transitions. [2020-07-20 11:13:08,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:13:08,572 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-20 11:13:08,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:08,578 INFO L225 Difference]: With dead ends: 190 [2020-07-20 11:13:08,578 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 11:13:08,582 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:13:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 11:13:08,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 109. [2020-07-20 11:13:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-07-20 11:13:08,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 192 transitions. [2020-07-20 11:13:08,610 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 192 transitions. Word has length 447 [2020-07-20 11:13:08,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:08,611 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 192 transitions. [2020-07-20 11:13:08,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:13:08,611 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 192 transitions. [2020-07-20 11:13:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-07-20 11:13:08,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:08,617 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 22, 22, 20, 18, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 9, 6, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:08,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:08,832 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:08,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:08,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1086306760, now seen corresponding path program 7 times [2020-07-20 11:13:08,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:08,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [367556641] [2020-07-20 11:13:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:09,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:09,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:09,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:09,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 241 proven. 424 refuted. 0 times theorem prover too weak. 2286 trivial. 0 not checked. [2020-07-20 11:13:09,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:11,459 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:11,922 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:12,122 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:12,250 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:12,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:12,322 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:12,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:12,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2951 backedges. 243 proven. 438 refuted. 0 times theorem prover too weak. 2270 trivial. 0 not checked. [2020-07-20 11:13:12,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [367556641] [2020-07-20 11:13:12,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:12,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:13:12,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420547755] [2020-07-20 11:13:12,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:13:12,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:12,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:13:12,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:13:12,682 INFO L87 Difference]: Start difference. First operand 109 states and 192 transitions. Second operand 17 states. [2020-07-20 11:13:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:13,094 INFO L93 Difference]: Finished difference Result 156 states and 320 transitions. [2020-07-20 11:13:13,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:13:13,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 327 [2020-07-20 11:13:13,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:13,099 INFO L225 Difference]: With dead ends: 156 [2020-07-20 11:13:13,099 INFO L226 Difference]: Without dead ends: 147 [2020-07-20 11:13:13,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 625 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:13:13,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-07-20 11:13:13,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 121. [2020-07-20 11:13:13,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 11:13:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 230 transitions. [2020-07-20 11:13:13,122 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 230 transitions. Word has length 327 [2020-07-20 11:13:13,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:13,123 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 230 transitions. [2020-07-20 11:13:13,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:13:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 230 transitions. [2020-07-20 11:13:13,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 597 [2020-07-20 11:13:13,131 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:13,131 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 38, 38, 35, 32, 24, 24, 24, 24, 24, 24, 24, 19, 19, 19, 19, 19, 19, 19, 16, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:13,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:13,345 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:13,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:13,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1906084546, now seen corresponding path program 8 times [2020-07-20 11:13:13,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:13,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [701683935] [2020-07-20 11:13:13,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:13,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:13,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 1325 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:13:13,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:14,269 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 354 proven. 1164 refuted. 0 times theorem prover too weak. 8877 trivial. 0 not checked. [2020-07-20 11:13:14,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:17,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:18,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:18,726 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,081 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,318 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,319 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,463 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,552 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:19,708 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 356 proven. 1183 refuted. 0 times theorem prover too weak. 8856 trivial. 0 not checked. [2020-07-20 11:13:20,161 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [701683935] [2020-07-20 11:13:20,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:20,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:13:20,162 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422296309] [2020-07-20 11:13:20,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:13:20,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:13:20,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:13:20,168 INFO L87 Difference]: Start difference. First operand 121 states and 230 transitions. Second operand 19 states. [2020-07-20 11:13:21,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:21,082 INFO L93 Difference]: Finished difference Result 159 states and 322 transitions. [2020-07-20 11:13:21,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:13:21,084 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 596 [2020-07-20 11:13:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:21,090 INFO L225 Difference]: With dead ends: 159 [2020-07-20 11:13:21,090 INFO L226 Difference]: Without dead ends: 150 [2020-07-20 11:13:21,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1198 GetRequests, 1159 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:13:21,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-07-20 11:13:21,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 120. [2020-07-20 11:13:21,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-07-20 11:13:21,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 218 transitions. [2020-07-20 11:13:21,117 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 218 transitions. Word has length 596 [2020-07-20 11:13:21,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:21,118 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 218 transitions. [2020-07-20 11:13:21,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:13:21,119 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 218 transitions. [2020-07-20 11:13:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-07-20 11:13:21,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:21,127 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 25, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:21,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:21,342 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:21,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:21,344 INFO L82 PathProgramCache]: Analyzing trace with hash -2126389129, now seen corresponding path program 9 times [2020-07-20 11:13:21,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:21,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1439390743] [2020-07-20 11:13:21,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:21,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 639 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2020-07-20 11:13:22,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:24,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:24,539 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,452 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,709 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:25,947 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:26,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:26,118 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:26,451 INFO L134 CoverageAnalysis]: Checked inductivity of 5656 backedges. 294 proven. 655 refuted. 0 times theorem prover too weak. 4707 trivial. 0 not checked. [2020-07-20 11:13:26,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1439390743] [2020-07-20 11:13:26,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:26,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:13:26,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15710690] [2020-07-20 11:13:26,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:13:26,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:26,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:13:26,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:13:26,455 INFO L87 Difference]: Start difference. First operand 120 states and 218 transitions. Second operand 17 states. [2020-07-20 11:13:26,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:26,956 INFO L93 Difference]: Finished difference Result 171 states and 354 transitions. [2020-07-20 11:13:26,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:13:26,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 447 [2020-07-20 11:13:26,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:26,963 INFO L225 Difference]: With dead ends: 171 [2020-07-20 11:13:26,963 INFO L226 Difference]: Without dead ends: 162 [2020-07-20 11:13:26,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 899 GetRequests, 865 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:13:26,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-07-20 11:13:26,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 114. [2020-07-20 11:13:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-20 11:13:26,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-20 11:13:26,988 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 447 [2020-07-20 11:13:26,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:26,988 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-20 11:13:26,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:13:26,989 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-20 11:13:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2020-07-20 11:13:26,994 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:26,995 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 26, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 11, 9, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:27,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:27,209 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:27,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:27,210 INFO L82 PathProgramCache]: Analyzing trace with hash 280776720, now seen corresponding path program 10 times [2020-07-20 11:13:27,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:27,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233749022] [2020-07-20 11:13:27,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:27,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:27,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 969 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:13:27,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 266 proven. 517 refuted. 0 times theorem prover too weak. 4594 trivial. 0 not checked. [2020-07-20 11:13:28,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:30,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:30,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:30,890 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,055 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,211 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,340 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 5377 backedges. 266 proven. 527 refuted. 0 times theorem prover too weak. 4584 trivial. 0 not checked. [2020-07-20 11:13:31,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233749022] [2020-07-20 11:13:31,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:31,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:13:31,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781431952] [2020-07-20 11:13:31,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:13:31,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:31,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:13:31,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:13:31,713 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 15 states. [2020-07-20 11:13:32,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:32,191 INFO L93 Difference]: Finished difference Result 196 states and 493 transitions. [2020-07-20 11:13:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:13:32,193 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 436 [2020-07-20 11:13:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:32,199 INFO L225 Difference]: With dead ends: 196 [2020-07-20 11:13:32,200 INFO L226 Difference]: Without dead ends: 187 [2020-07-20 11:13:32,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 847 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:13:32,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-07-20 11:13:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 116. [2020-07-20 11:13:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-07-20 11:13:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 214 transitions. [2020-07-20 11:13:32,231 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 214 transitions. Word has length 436 [2020-07-20 11:13:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:32,231 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 214 transitions. [2020-07-20 11:13:32,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:13:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 214 transitions. [2020-07-20 11:13:32,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-07-20 11:13:32,239 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:32,240 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 29, 26, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 12, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:32,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:32,455 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:32,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:32,457 INFO L82 PathProgramCache]: Analyzing trace with hash 502421758, now seen corresponding path program 11 times [2020-07-20 11:13:32,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:32,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825732835] [2020-07-20 11:13:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:32,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:32,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6795 backedges. 307 proven. 724 refuted. 0 times theorem prover too weak. 5764 trivial. 0 not checked. [2020-07-20 11:13:33,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:35,879 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-07-20 11:13:36,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:36,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:37,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:37,268 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:37,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:37,368 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:37,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:37,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:37,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6795 backedges. 309 proven. 736 refuted. 0 times theorem prover too weak. 5750 trivial. 0 not checked. [2020-07-20 11:13:37,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825732835] [2020-07-20 11:13:37,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:37,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:13:37,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682674896] [2020-07-20 11:13:37,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:13:37,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:37,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:13:37,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:13:37,949 INFO L87 Difference]: Start difference. First operand 116 states and 214 transitions. Second operand 17 states. [2020-07-20 11:13:38,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:38,478 INFO L93 Difference]: Finished difference Result 149 states and 292 transitions. [2020-07-20 11:13:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:13:38,481 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 488 [2020-07-20 11:13:38,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:38,485 INFO L225 Difference]: With dead ends: 149 [2020-07-20 11:13:38,486 INFO L226 Difference]: Without dead ends: 140 [2020-07-20 11:13:38,489 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 947 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:13:38,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-07-20 11:13:38,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 114. [2020-07-20 11:13:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-07-20 11:13:38,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 206 transitions. [2020-07-20 11:13:38,512 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 206 transitions. Word has length 488 [2020-07-20 11:13:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:38,513 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 206 transitions. [2020-07-20 11:13:38,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:13:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 206 transitions. [2020-07-20 11:13:38,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2020-07-20 11:13:38,522 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:38,523 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 42, 42, 37, 34, 22, 22, 22, 22, 22, 22, 22, 21, 21, 21, 21, 21, 21, 21, 16, 12, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:38,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:38,738 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:38,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:38,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1796391298, now seen corresponding path program 12 times [2020-07-20 11:13:38,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:38,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501874548] [2020-07-20 11:13:38,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:39,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 1333 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:13:39,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 467 proven. 1287 refuted. 0 times theorem prover too weak. 8641 trivial. 0 not checked. [2020-07-20 11:13:40,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:44,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:44,477 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:45,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:45,681 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:46,930 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:47,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:47,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:47,151 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:47,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 10395 backedges. 469 proven. 1315 refuted. 0 times theorem prover too weak. 8611 trivial. 0 not checked. [2020-07-20 11:13:47,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501874548] [2020-07-20 11:13:47,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:47,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:13:47,775 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185017201] [2020-07-20 11:13:47,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:13:47,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:47,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:13:47,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:13:47,778 INFO L87 Difference]: Start difference. First operand 114 states and 206 transitions. Second operand 21 states. [2020-07-20 11:13:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:48,549 INFO L93 Difference]: Finished difference Result 155 states and 300 transitions. [2020-07-20 11:13:48,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:13:48,551 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 600 [2020-07-20 11:13:48,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:48,555 INFO L225 Difference]: With dead ends: 155 [2020-07-20 11:13:48,555 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 11:13:48,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1207 GetRequests, 1163 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:13:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 11:13:48,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 122. [2020-07-20 11:13:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-07-20 11:13:48,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 215 transitions. [2020-07-20 11:13:48,576 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 215 transitions. Word has length 600 [2020-07-20 11:13:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:48,576 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 215 transitions. [2020-07-20 11:13:48,576 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:13:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 215 transitions. [2020-07-20 11:13:48,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-20 11:13:48,582 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:48,583 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 29, 29, 24, 23, 16, 16, 16, 16, 16, 16, 16, 14, 14, 14, 14, 14, 14, 14, 10, 8, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:48,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:48,798 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:48,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:48,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1727216841, now seen corresponding path program 13 times [2020-07-20 11:13:48,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:48,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557298384] [2020-07-20 11:13:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:49,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:49,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:13:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:49,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 401 proven. 493 refuted. 0 times theorem prover too weak. 4087 trivial. 0 not checked. [2020-07-20 11:13:49,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:51,892 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,281 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,585 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:52,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,023 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:53,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4981 backedges. 403 proven. 507 refuted. 0 times theorem prover too weak. 4071 trivial. 0 not checked. [2020-07-20 11:13:53,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557298384] [2020-07-20 11:13:53,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:13:53,589 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:13:53,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015553214] [2020-07-20 11:13:53,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:13:53,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:13:53,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:13:53,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:13:53,591 INFO L87 Difference]: Start difference. First operand 122 states and 215 transitions. Second operand 17 states. [2020-07-20 11:13:54,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:13:54,066 INFO L93 Difference]: Finished difference Result 174 states and 366 transitions. [2020-07-20 11:13:54,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:13:54,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 420 [2020-07-20 11:13:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:13:54,071 INFO L225 Difference]: With dead ends: 174 [2020-07-20 11:13:54,071 INFO L226 Difference]: Without dead ends: 165 [2020-07-20 11:13:54,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 845 GetRequests, 811 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:13:54,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-07-20 11:13:54,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 142. [2020-07-20 11:13:54,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-07-20 11:13:54,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 278 transitions. [2020-07-20 11:13:54,104 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 278 transitions. Word has length 420 [2020-07-20 11:13:54,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:13:54,104 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 278 transitions. [2020-07-20 11:13:54,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:13:54,105 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 278 transitions. [2020-07-20 11:13:54,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-20 11:13:54,115 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:13:54,116 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 34, 34, 28, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:13:54,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:54,331 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:13:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:13:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1318222248, now seen corresponding path program 14 times [2020-07-20 11:13:54,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:13:54,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2091908633] [2020-07-20 11:13:54,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:13:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:13:54,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:13:54,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:13:55,441 INFO L134 CoverageAnalysis]: Checked inductivity of 7557 backedges. 676 proven. 782 refuted. 0 times theorem prover too weak. 6099 trivial. 0 not checked. [2020-07-20 11:13:55,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:13:58,545 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:59,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:59,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:13:59,714 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,097 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,290 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:00,616 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7557 backedges. 676 proven. 812 refuted. 0 times theorem prover too weak. 6069 trivial. 0 not checked. [2020-07-20 11:14:01,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2091908633] [2020-07-20 11:14:01,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:01,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:14:01,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946397062] [2020-07-20 11:14:01,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:14:01,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:01,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:14:01,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:14:01,098 INFO L87 Difference]: Start difference. First operand 142 states and 278 transitions. Second operand 21 states. [2020-07-20 11:14:01,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:01,716 INFO L93 Difference]: Finished difference Result 176 states and 346 transitions. [2020-07-20 11:14:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:14:01,717 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 512 [2020-07-20 11:14:01,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:01,721 INFO L225 Difference]: With dead ends: 176 [2020-07-20 11:14:01,721 INFO L226 Difference]: Without dead ends: 158 [2020-07-20 11:14:01,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1031 GetRequests, 987 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:14:01,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-07-20 11:14:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 150. [2020-07-20 11:14:01,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-07-20 11:14:01,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 290 transitions. [2020-07-20 11:14:01,740 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 290 transitions. Word has length 512 [2020-07-20 11:14:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:01,741 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 290 transitions. [2020-07-20 11:14:01,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:14:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 290 transitions. [2020-07-20 11:14:01,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2020-07-20 11:14:01,747 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:01,747 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 24, 23, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:01,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:01,961 INFO L427 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:01,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:01,961 INFO L82 PathProgramCache]: Analyzing trace with hash 873192572, now seen corresponding path program 15 times [2020-07-20 11:14:01,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:01,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037341850] [2020-07-20 11:14:01,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:02,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:02,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 961 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:02,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 466 proven. 584 refuted. 0 times theorem prover too weak. 4231 trivial. 0 not checked. [2020-07-20 11:14:02,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:04,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,371 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,372 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,654 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,655 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,827 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,936 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:05,937 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,152 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5281 backedges. 470 proven. 601 refuted. 0 times theorem prover too weak. 4210 trivial. 0 not checked. [2020-07-20 11:14:06,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037341850] [2020-07-20 11:14:06,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:06,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:14:06,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080050862] [2020-07-20 11:14:06,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:06,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:06,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:06,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:06,628 INFO L87 Difference]: Start difference. First operand 150 states and 290 transitions. Second operand 19 states. [2020-07-20 11:14:07,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:07,034 INFO L93 Difference]: Finished difference Result 203 states and 429 transitions. [2020-07-20 11:14:07,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:07,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 432 [2020-07-20 11:14:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:07,039 INFO L225 Difference]: With dead ends: 203 [2020-07-20 11:14:07,040 INFO L226 Difference]: Without dead ends: 194 [2020-07-20 11:14:07,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 870 GetRequests, 831 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:07,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-20 11:14:07,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 146. [2020-07-20 11:14:07,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-07-20 11:14:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 273 transitions. [2020-07-20 11:14:07,059 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 273 transitions. Word has length 432 [2020-07-20 11:14:07,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:07,060 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 273 transitions. [2020-07-20 11:14:07,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:07,060 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 273 transitions. [2020-07-20 11:14:07,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2020-07-20 11:14:07,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:07,066 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 26, 23, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 11, 8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:07,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:07,281 INFO L427 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:07,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:07,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1349343847, now seen corresponding path program 16 times [2020-07-20 11:14:07,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:07,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637010579] [2020-07-20 11:14:07,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:07,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:07,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:07,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5018 backedges. 409 proven. 469 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2020-07-20 11:14:07,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:09,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:09,990 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:10,263 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:10,264 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:10,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:10,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:10,505 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:10,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:11,152 INFO L134 CoverageAnalysis]: Checked inductivity of 5018 backedges. 411 proven. 481 refuted. 0 times theorem prover too weak. 4126 trivial. 0 not checked. [2020-07-20 11:14:11,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637010579] [2020-07-20 11:14:11,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:11,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:11,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986412603] [2020-07-20 11:14:11,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:11,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:11,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:11,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:11,155 INFO L87 Difference]: Start difference. First operand 146 states and 273 transitions. Second operand 17 states. [2020-07-20 11:14:11,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:11,559 INFO L93 Difference]: Finished difference Result 229 states and 503 transitions. [2020-07-20 11:14:11,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:11,561 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 422 [2020-07-20 11:14:11,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:11,565 INFO L225 Difference]: With dead ends: 229 [2020-07-20 11:14:11,566 INFO L226 Difference]: Without dead ends: 220 [2020-07-20 11:14:11,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 849 GetRequests, 815 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:11,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-07-20 11:14:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 141. [2020-07-20 11:14:11,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-07-20 11:14:11,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 255 transitions. [2020-07-20 11:14:11,604 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 255 transitions. Word has length 422 [2020-07-20 11:14:11,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:11,605 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 255 transitions. [2020-07-20 11:14:11,605 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:11,606 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 255 transitions. [2020-07-20 11:14:11,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 421 [2020-07-20 11:14:11,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:11,614 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 24, 23, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 9, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:11,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:11,828 INFO L427 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:11,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:11,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1595677885, now seen corresponding path program 17 times [2020-07-20 11:14:11,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:11,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652865876] [2020-07-20 11:14:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:12,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 934 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:14:12,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4969 backedges. 356 proven. 388 refuted. 0 times theorem prover too weak. 4225 trivial. 0 not checked. [2020-07-20 11:14:12,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:13,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:14,229 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:14,230 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:14,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:14,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:14,447 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:14,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:14,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:15,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4969 backedges. 356 proven. 400 refuted. 0 times theorem prover too weak. 4213 trivial. 0 not checked. [2020-07-20 11:14:15,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652865876] [2020-07-20 11:14:15,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:15,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:14:15,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912190309] [2020-07-20 11:14:15,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:14:15,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:15,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:14:15,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:14:15,166 INFO L87 Difference]: Start difference. First operand 141 states and 255 transitions. Second operand 15 states. [2020-07-20 11:14:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:15,485 INFO L93 Difference]: Finished difference Result 269 states and 678 transitions. [2020-07-20 11:14:15,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:14:15,486 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 420 [2020-07-20 11:14:15,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:15,491 INFO L225 Difference]: With dead ends: 269 [2020-07-20 11:14:15,492 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 11:14:15,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 844 GetRequests, 815 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:14:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 11:14:15,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 143. [2020-07-20 11:14:15,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-20 11:14:15,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 264 transitions. [2020-07-20 11:14:15,518 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 264 transitions. Word has length 420 [2020-07-20 11:14:15,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:15,518 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 264 transitions. [2020-07-20 11:14:15,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:14:15,518 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 264 transitions. [2020-07-20 11:14:15,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2020-07-20 11:14:15,524 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:15,524 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 31, 30, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 12, 11, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:15,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:15,740 INFO L427 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash -51944787, now seen corresponding path program 18 times [2020-07-20 11:14:15,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:15,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189515322] [2020-07-20 11:14:15,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:16,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:16,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 1178 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 8044 backedges. 449 proven. 679 refuted. 0 times theorem prover too weak. 6916 trivial. 0 not checked. [2020-07-20 11:14:16,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:18,743 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,267 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,384 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,499 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:19,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8044 backedges. 449 proven. 695 refuted. 0 times theorem prover too weak. 6900 trivial. 0 not checked. [2020-07-20 11:14:20,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189515322] [2020-07-20 11:14:20,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:20,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:20,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217557273] [2020-07-20 11:14:20,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:20,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:20,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:20,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:20,098 INFO L87 Difference]: Start difference. First operand 143 states and 264 transitions. Second operand 17 states. [2020-07-20 11:14:20,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:20,449 INFO L93 Difference]: Finished difference Result 203 states and 415 transitions. [2020-07-20 11:14:20,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:20,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 530 [2020-07-20 11:14:20,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:20,453 INFO L225 Difference]: With dead ends: 203 [2020-07-20 11:14:20,454 INFO L226 Difference]: Without dead ends: 194 [2020-07-20 11:14:20,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1065 GetRequests, 1031 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:20,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-07-20 11:14:20,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 138. [2020-07-20 11:14:20,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-20 11:14:20,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 246 transitions. [2020-07-20 11:14:20,472 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 246 transitions. Word has length 530 [2020-07-20 11:14:20,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:20,472 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 246 transitions. [2020-07-20 11:14:20,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:20,472 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 246 transitions. [2020-07-20 11:14:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-07-20 11:14:20,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:20,479 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 40, 40, 35, 34, 22, 22, 22, 22, 22, 22, 22, 20, 20, 20, 20, 20, 20, 20, 14, 13, 11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:20,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:20,693 INFO L427 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:20,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:20,694 INFO L82 PathProgramCache]: Analyzing trace with hash -969021451, now seen corresponding path program 19 times [2020-07-20 11:14:20,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:20,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918247323] [2020-07-20 11:14:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:21,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 1302 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:21,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 439 proven. 1073 refuted. 0 times theorem prover too weak. 8408 trivial. 0 not checked. [2020-07-20 11:14:21,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:24,251 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,597 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,658 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,718 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:25,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9920 backedges. 443 proven. 1090 refuted. 0 times theorem prover too weak. 8387 trivial. 0 not checked. [2020-07-20 11:14:26,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918247323] [2020-07-20 11:14:26,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:26,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:14:26,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856917181] [2020-07-20 11:14:26,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:26,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:26,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:26,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:26,178 INFO L87 Difference]: Start difference. First operand 138 states and 246 transitions. Second operand 19 states. [2020-07-20 11:14:26,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:26,610 INFO L93 Difference]: Finished difference Result 198 states and 388 transitions. [2020-07-20 11:14:26,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:26,611 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 586 [2020-07-20 11:14:26,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:26,615 INFO L225 Difference]: With dead ends: 198 [2020-07-20 11:14:26,615 INFO L226 Difference]: Without dead ends: 164 [2020-07-20 11:14:26,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1178 GetRequests, 1139 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:26,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-07-20 11:14:26,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 158. [2020-07-20 11:14:26,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-07-20 11:14:26,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 293 transitions. [2020-07-20 11:14:26,632 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 293 transitions. Word has length 586 [2020-07-20 11:14:26,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:26,632 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 293 transitions. [2020-07-20 11:14:26,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:26,632 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 293 transitions. [2020-07-20 11:14:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-20 11:14:26,637 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:26,638 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 26, 25, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 10, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:26,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:26,852 INFO L427 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:26,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:26,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1302997839, now seen corresponding path program 20 times [2020-07-20 11:14:26,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:26,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608096679] [2020-07-20 11:14:26,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:27,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:27,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 566 proven. 546 refuted. 0 times theorem prover too weak. 4569 trivial. 0 not checked. [2020-07-20 11:14:27,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:29,835 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:29,836 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,636 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,821 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:30,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:31,004 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:31,062 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:31,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 5681 backedges. 566 proven. 569 refuted. 0 times theorem prover too weak. 4546 trivial. 0 not checked. [2020-07-20 11:14:31,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608096679] [2020-07-20 11:14:31,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:31,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:14:31,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139745785] [2020-07-20 11:14:31,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:31,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:31,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:31,637 INFO L87 Difference]: Start difference. First operand 158 states and 293 transitions. Second operand 19 states. [2020-07-20 11:14:32,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:32,139 INFO L93 Difference]: Finished difference Result 222 states and 453 transitions. [2020-07-20 11:14:32,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:32,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 448 [2020-07-20 11:14:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:32,144 INFO L225 Difference]: With dead ends: 222 [2020-07-20 11:14:32,144 INFO L226 Difference]: Without dead ends: 204 [2020-07-20 11:14:32,146 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 902 GetRequests, 863 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:32,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-07-20 11:14:32,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 149. [2020-07-20 11:14:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-07-20 11:14:32,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 284 transitions. [2020-07-20 11:14:32,164 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 284 transitions. Word has length 448 [2020-07-20 11:14:32,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:32,165 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 284 transitions. [2020-07-20 11:14:32,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:32,165 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 284 transitions. [2020-07-20 11:14:32,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-07-20 11:14:32,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:32,171 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 30, 28, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 12, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:32,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:32,385 INFO L427 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:32,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:32,386 INFO L82 PathProgramCache]: Analyzing trace with hash 293936231, now seen corresponding path program 21 times [2020-07-20 11:14:32,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:32,387 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205591316] [2020-07-20 11:14:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:32,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:14:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:33,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 404 proven. 507 refuted. 0 times theorem prover too weak. 6310 trivial. 0 not checked. [2020-07-20 11:14:33,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:35,119 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,120 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,334 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,455 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,634 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:35,855 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:36,309 INFO L134 CoverageAnalysis]: Checked inductivity of 7221 backedges. 406 proven. 515 refuted. 0 times theorem prover too weak. 6300 trivial. 0 not checked. [2020-07-20 11:14:36,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205591316] [2020-07-20 11:14:36,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:36,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:14:36,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527363091] [2020-07-20 11:14:36,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:14:36,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:36,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:14:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:14:36,312 INFO L87 Difference]: Start difference. First operand 149 states and 284 transitions. Second operand 15 states. [2020-07-20 11:14:36,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:36,609 INFO L93 Difference]: Finished difference Result 240 states and 536 transitions. [2020-07-20 11:14:36,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:14:36,610 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 503 [2020-07-20 11:14:36,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:36,615 INFO L225 Difference]: With dead ends: 240 [2020-07-20 11:14:36,615 INFO L226 Difference]: Without dead ends: 231 [2020-07-20 11:14:36,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 981 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:14:36,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-20 11:14:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-07-20 11:14:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-20 11:14:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 325 transitions. [2020-07-20 11:14:36,636 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 325 transitions. Word has length 503 [2020-07-20 11:14:36,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:36,637 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 325 transitions. [2020-07-20 11:14:36,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:14:36,637 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 325 transitions. [2020-07-20 11:14:36,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 424 [2020-07-20 11:14:36,643 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:36,643 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 25, 25, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 10, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:36,858 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:36,859 INFO L427 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:36,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:36,860 INFO L82 PathProgramCache]: Analyzing trace with hash -2033109317, now seen corresponding path program 22 times [2020-07-20 11:14:36,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:36,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418916547] [2020-07-20 11:14:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:37,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 940 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:37,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:37,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 615 proven. 429 refuted. 0 times theorem prover too weak. 3996 trivial. 0 not checked. [2020-07-20 11:14:37,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:39,901 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,670 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,874 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,983 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:40,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:41,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:41,045 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:41,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:41,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:41,736 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 617 proven. 448 refuted. 0 times theorem prover too weak. 3975 trivial. 0 not checked. [2020-07-20 11:14:41,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418916547] [2020-07-20 11:14:41,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:41,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:14:41,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234193685] [2020-07-20 11:14:41,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:14:41,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:41,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:14:41,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:14:41,738 INFO L87 Difference]: Start difference. First operand 159 states and 325 transitions. Second operand 19 states. [2020-07-20 11:14:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:42,297 INFO L93 Difference]: Finished difference Result 196 states and 403 transitions. [2020-07-20 11:14:42,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:14:42,299 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 423 [2020-07-20 11:14:42,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:42,303 INFO L225 Difference]: With dead ends: 196 [2020-07-20 11:14:42,303 INFO L226 Difference]: Without dead ends: 178 [2020-07-20 11:14:42,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 852 GetRequests, 813 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:14:42,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-07-20 11:14:42,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 169. [2020-07-20 11:14:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-07-20 11:14:42,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 357 transitions. [2020-07-20 11:14:42,323 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 357 transitions. Word has length 423 [2020-07-20 11:14:42,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:42,324 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 357 transitions. [2020-07-20 11:14:42,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:14:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 357 transitions. [2020-07-20 11:14:42,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2020-07-20 11:14:42,331 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:42,331 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 31, 31, 26, 25, 20, 20, 20, 20, 20, 20, 20, 15, 15, 15, 15, 15, 15, 15, 15, 10, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:42,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:42,547 INFO L427 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:42,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash 915207628, now seen corresponding path program 23 times [2020-07-20 11:14:42,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:42,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120808421] [2020-07-20 11:14:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:43,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:43,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 1077 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:43,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 517 proven. 515 refuted. 0 times theorem prover too weak. 5753 trivial. 0 not checked. [2020-07-20 11:14:43,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:45,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:45,599 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:45,973 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:45,974 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:46,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:46,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:46,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:46,392 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:46,393 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:46,479 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:46,721 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6785 backedges. 521 proven. 525 refuted. 0 times theorem prover too weak. 5739 trivial. 0 not checked. [2020-07-20 11:14:47,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120808421] [2020-07-20 11:14:47,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:47,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:47,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265036136] [2020-07-20 11:14:47,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:47,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:47,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:47,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:47,290 INFO L87 Difference]: Start difference. First operand 169 states and 357 transitions. Second operand 17 states. [2020-07-20 11:14:47,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:47,660 INFO L93 Difference]: Finished difference Result 211 states and 447 transitions. [2020-07-20 11:14:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:47,662 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 484 [2020-07-20 11:14:47,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:47,666 INFO L225 Difference]: With dead ends: 211 [2020-07-20 11:14:47,666 INFO L226 Difference]: Without dead ends: 202 [2020-07-20 11:14:47,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 939 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:47,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-07-20 11:14:47,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 159. [2020-07-20 11:14:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-07-20 11:14:47,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 317 transitions. [2020-07-20 11:14:47,686 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 317 transitions. Word has length 484 [2020-07-20 11:14:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:47,686 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 317 transitions. [2020-07-20 11:14:47,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 317 transitions. [2020-07-20 11:14:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 450 [2020-07-20 11:14:47,690 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:47,690 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 26, 26, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 11, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:47,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:47,891 INFO L427 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:47,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:47,892 INFO L82 PathProgramCache]: Analyzing trace with hash -685942111, now seen corresponding path program 24 times [2020-07-20 11:14:47,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:47,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200134702] [2020-07-20 11:14:47,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:48,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:48,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 998 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:14:48,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 676 proven. 289 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2020-07-20 11:14:48,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:50,228 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:50,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:50,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:50,926 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:50,927 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,113 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,114 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:51,361 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:52,206 INFO L134 CoverageAnalysis]: Checked inductivity of 5718 backedges. 680 proven. 301 refuted. 0 times theorem prover too weak. 4737 trivial. 0 not checked. [2020-07-20 11:14:52,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200134702] [2020-07-20 11:14:52,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:52,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:14:52,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365181770] [2020-07-20 11:14:52,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:14:52,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:52,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:14:52,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:14:52,208 INFO L87 Difference]: Start difference. First operand 159 states and 317 transitions. Second operand 17 states. [2020-07-20 11:14:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:52,546 INFO L93 Difference]: Finished difference Result 246 states and 600 transitions. [2020-07-20 11:14:52,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:14:52,548 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 449 [2020-07-20 11:14:52,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:52,552 INFO L225 Difference]: With dead ends: 246 [2020-07-20 11:14:52,552 INFO L226 Difference]: Without dead ends: 231 [2020-07-20 11:14:52,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 903 GetRequests, 869 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:14:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-07-20 11:14:52,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 197. [2020-07-20 11:14:52,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-07-20 11:14:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 443 transitions. [2020-07-20 11:14:52,578 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 443 transitions. Word has length 449 [2020-07-20 11:14:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:52,578 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 443 transitions. [2020-07-20 11:14:52,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:14:52,578 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 443 transitions. [2020-07-20 11:14:52,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2020-07-20 11:14:52,585 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:52,585 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 32, 32, 25, 25, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 10, 9, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:52,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:52,801 INFO L427 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:52,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1193223542, now seen corresponding path program 25 times [2020-07-20 11:14:52,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:52,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848750779] [2020-07-20 11:14:52,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:53,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 1021 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:14:53,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:53,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 399 proven. 405 refuted. 0 times theorem prover too weak. 5184 trivial. 0 not checked. [2020-07-20 11:14:53,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:55,285 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,798 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:55,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5988 backedges. 399 proven. 415 refuted. 0 times theorem prover too weak. 5174 trivial. 0 not checked. [2020-07-20 11:14:56,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848750779] [2020-07-20 11:14:56,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:14:56,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:14:56,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196848659] [2020-07-20 11:14:56,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:14:56,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:14:56,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:14:56,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:14:56,432 INFO L87 Difference]: Start difference. First operand 197 states and 443 transitions. Second operand 15 states. [2020-07-20 11:14:56,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:14:56,746 INFO L93 Difference]: Finished difference Result 295 states and 731 transitions. [2020-07-20 11:14:56,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:14:56,748 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 459 [2020-07-20 11:14:56,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:14:56,753 INFO L225 Difference]: With dead ends: 295 [2020-07-20 11:14:56,753 INFO L226 Difference]: Without dead ends: 286 [2020-07-20 11:14:56,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 922 GetRequests, 893 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:14:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-07-20 11:14:56,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 194. [2020-07-20 11:14:56,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-07-20 11:14:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 433 transitions. [2020-07-20 11:14:56,783 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 433 transitions. Word has length 459 [2020-07-20 11:14:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:14:56,784 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 433 transitions. [2020-07-20 11:14:56,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:14:56,784 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 433 transitions. [2020-07-20 11:14:56,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2020-07-20 11:14:56,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:14:56,791 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 32, 32, 25, 25, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 12, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:14:57,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:57,005 INFO L427 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:14:57,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:14:57,006 INFO L82 PathProgramCache]: Analyzing trace with hash 405401827, now seen corresponding path program 26 times [2020-07-20 11:14:57,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:14:57,006 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318106962] [2020-07-20 11:14:57,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:14:57,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:14:57,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 1048 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:14:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:14:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6340 backedges. 844 proven. 317 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2020-07-20 11:14:57,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:14:59,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:14:59,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:00,438 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:00,439 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:00,749 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:00,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:00,946 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,079 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,080 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:01,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:02,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6340 backedges. 848 proven. 334 refuted. 0 times theorem prover too weak. 5158 trivial. 0 not checked. [2020-07-20 11:15:02,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318106962] [2020-07-20 11:15:02,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:02,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:02,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650382543] [2020-07-20 11:15:02,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:02,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:02,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:02,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:02,376 INFO L87 Difference]: Start difference. First operand 194 states and 433 transitions. Second operand 19 states. [2020-07-20 11:15:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:02,806 INFO L93 Difference]: Finished difference Result 255 states and 621 transitions. [2020-07-20 11:15:02,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:02,808 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 471 [2020-07-20 11:15:02,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:02,812 INFO L225 Difference]: With dead ends: 255 [2020-07-20 11:15:02,813 INFO L226 Difference]: Without dead ends: 240 [2020-07-20 11:15:02,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 948 GetRequests, 909 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:02,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-07-20 11:15:02,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 192. [2020-07-20 11:15:02,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-07-20 11:15:02,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 399 transitions. [2020-07-20 11:15:02,832 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 399 transitions. Word has length 471 [2020-07-20 11:15:02,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:02,833 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 399 transitions. [2020-07-20 11:15:02,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:02,833 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 399 transitions. [2020-07-20 11:15:02,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-20 11:15:02,838 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:02,839 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 10, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:03,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:03,039 INFO L427 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:03,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:03,040 INFO L82 PathProgramCache]: Analyzing trace with hash 481849910, now seen corresponding path program 27 times [2020-07-20 11:15:03,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:03,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1842820377] [2020-07-20 11:15:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:03,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:15:03,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:03,992 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 680 proven. 291 refuted. 0 times theorem prover too weak. 5085 trivial. 0 not checked. [2020-07-20 11:15:03,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:05,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:05,896 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,168 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,365 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,366 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:06,661 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:07,556 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 682 proven. 305 refuted. 0 times theorem prover too weak. 5069 trivial. 0 not checked. [2020-07-20 11:15:07,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1842820377] [2020-07-20 11:15:07,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:07,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:15:07,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137264063] [2020-07-20 11:15:07,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:15:07,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:07,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:15:07,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:15:07,559 INFO L87 Difference]: Start difference. First operand 192 states and 399 transitions. Second operand 17 states. [2020-07-20 11:15:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:07,900 INFO L93 Difference]: Finished difference Result 306 states and 757 transitions. [2020-07-20 11:15:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:15:07,902 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 462 [2020-07-20 11:15:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:07,907 INFO L225 Difference]: With dead ends: 306 [2020-07-20 11:15:07,907 INFO L226 Difference]: Without dead ends: 291 [2020-07-20 11:15:07,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 895 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:15:07,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-07-20 11:15:07,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 187. [2020-07-20 11:15:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-07-20 11:15:07,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 375 transitions. [2020-07-20 11:15:07,937 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 375 transitions. Word has length 462 [2020-07-20 11:15:07,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:07,938 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 375 transitions. [2020-07-20 11:15:07,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:15:07,938 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 375 transitions. [2020-07-20 11:15:07,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-07-20 11:15:07,944 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:07,944 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 28, 28, 24, 24, 15, 15, 15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 10, 9, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:08,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:08,158 INFO L427 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:08,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:08,159 INFO L82 PathProgramCache]: Analyzing trace with hash -443177628, now seen corresponding path program 28 times [2020-07-20 11:15:08,159 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:08,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723148387] [2020-07-20 11:15:08,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:08,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 909 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:15:08,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4708 backedges. 568 proven. 161 refuted. 0 times theorem prover too weak. 3979 trivial. 0 not checked. [2020-07-20 11:15:08,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:10,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,312 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,464 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,580 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:10,846 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4708 backedges. 570 proven. 169 refuted. 0 times theorem prover too weak. 3969 trivial. 0 not checked. [2020-07-20 11:15:11,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723148387] [2020-07-20 11:15:11,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:11,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:15:11,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569663723] [2020-07-20 11:15:11,731 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:15:11,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:11,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:15:11,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:15:11,732 INFO L87 Difference]: Start difference. First operand 187 states and 375 transitions. Second operand 15 states. [2020-07-20 11:15:12,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:12,072 INFO L93 Difference]: Finished difference Result 331 states and 885 transitions. [2020-07-20 11:15:12,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:15:12,073 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 409 [2020-07-20 11:15:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:12,080 INFO L225 Difference]: With dead ends: 331 [2020-07-20 11:15:12,080 INFO L226 Difference]: Without dead ends: 316 [2020-07-20 11:15:12,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 822 GetRequests, 793 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:15:12,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-07-20 11:15:12,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 189. [2020-07-20 11:15:12,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-07-20 11:15:12,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 388 transitions. [2020-07-20 11:15:12,111 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 388 transitions. Word has length 409 [2020-07-20 11:15:12,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:12,111 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 388 transitions. [2020-07-20 11:15:12,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:15:12,111 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 388 transitions. [2020-07-20 11:15:12,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 463 [2020-07-20 11:15:12,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:12,119 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 26, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:12,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:12,331 INFO L427 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:12,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:12,332 INFO L82 PathProgramCache]: Analyzing trace with hash -1741972304, now seen corresponding path program 29 times [2020-07-20 11:15:12,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:12,333 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003131316] [2020-07-20 11:15:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:12,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:12,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 1027 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:15:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 707 proven. 265 refuted. 0 times theorem prover too weak. 5084 trivial. 0 not checked. [2020-07-20 11:15:13,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:14,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,171 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,694 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:15,767 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:16,034 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:16,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6056 backedges. 711 proven. 275 refuted. 0 times theorem prover too weak. 5070 trivial. 0 not checked. [2020-07-20 11:15:16,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003131316] [2020-07-20 11:15:16,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:16,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:15:16,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044012332] [2020-07-20 11:15:16,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:15:16,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:16,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:15:16,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:15:16,988 INFO L87 Difference]: Start difference. First operand 189 states and 388 transitions. Second operand 17 states. [2020-07-20 11:15:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:17,393 INFO L93 Difference]: Finished difference Result 265 states and 584 transitions. [2020-07-20 11:15:17,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:15:17,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 462 [2020-07-20 11:15:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:17,403 INFO L225 Difference]: With dead ends: 265 [2020-07-20 11:15:17,403 INFO L226 Difference]: Without dead ends: 250 [2020-07-20 11:15:17,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 929 GetRequests, 895 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:15:17,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-07-20 11:15:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 182. [2020-07-20 11:15:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-07-20 11:15:17,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 356 transitions. [2020-07-20 11:15:17,437 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 356 transitions. Word has length 462 [2020-07-20 11:15:17,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:17,438 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 356 transitions. [2020-07-20 11:15:17,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:15:17,438 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 356 transitions. [2020-07-20 11:15:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-20 11:15:17,447 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:17,447 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:17,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:17,662 INFO L427 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:17,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1239409556, now seen corresponding path program 30 times [2020-07-20 11:15:17,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:17,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013105209] [2020-07-20 11:15:17,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:18,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:18,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 870 proven. 208 refuted. 0 times theorem prover too weak. 4274 trivial. 0 not checked. [2020-07-20 11:15:18,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:20,675 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:21,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:21,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:21,646 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:21,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:21,865 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:22,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:22,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:22,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:22,172 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:22,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 874 proven. 227 refuted. 0 times theorem prover too weak. 4251 trivial. 0 not checked. [2020-07-20 11:15:23,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013105209] [2020-07-20 11:15:23,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:23,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 20 [2020-07-20 11:15:23,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495547398] [2020-07-20 11:15:23,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 11:15:23,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:23,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 11:15:23,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:15:23,475 INFO L87 Difference]: Start difference. First operand 182 states and 356 transitions. Second operand 20 states. [2020-07-20 11:15:24,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:24,067 INFO L93 Difference]: Finished difference Result 320 states and 737 transitions. [2020-07-20 11:15:24,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:24,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 435 [2020-07-20 11:15:24,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:24,074 INFO L225 Difference]: With dead ends: 320 [2020-07-20 11:15:24,075 INFO L226 Difference]: Without dead ends: 305 [2020-07-20 11:15:24,080 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 837 SyntacticMatches, 14 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=561, Unknown=0, NotChecked=0, Total=702 [2020-07-20 11:15:24,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-07-20 11:15:24,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 232. [2020-07-20 11:15:24,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-07-20 11:15:24,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 499 transitions. [2020-07-20 11:15:24,108 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 499 transitions. Word has length 435 [2020-07-20 11:15:24,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:24,108 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 499 transitions. [2020-07-20 11:15:24,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 11:15:24,108 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 499 transitions. [2020-07-20 11:15:24,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-07-20 11:15:24,118 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:24,118 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 31, 30, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 13, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:24,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:24,332 INFO L427 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:24,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:24,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1799110729, now seen corresponding path program 31 times [2020-07-20 11:15:24,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:24,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126177576] [2020-07-20 11:15:24,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:25,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:25,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 251 proven. 1024 refuted. 0 times theorem prover too weak. 6045 trivial. 0 not checked. [2020-07-20 11:15:25,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:26,341 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2020-07-20 11:15:28,495 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:29,448 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:29,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,331 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,460 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,537 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,538 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,586 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,620 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7320 backedges. 259 proven. 1037 refuted. 0 times theorem prover too weak. 6024 trivial. 0 not checked. [2020-07-20 11:15:30,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126177576] [2020-07-20 11:15:30,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:30,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:30,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650768168] [2020-07-20 11:15:30,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:30,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:30,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:30,768 INFO L87 Difference]: Start difference. First operand 232 states and 499 transitions. Second operand 19 states. [2020-07-20 11:15:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:31,461 INFO L93 Difference]: Finished difference Result 514 states and 1300 transitions. [2020-07-20 11:15:31,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:31,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 506 [2020-07-20 11:15:31,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:31,470 INFO L225 Difference]: With dead ends: 514 [2020-07-20 11:15:31,471 INFO L226 Difference]: Without dead ends: 278 [2020-07-20 11:15:31,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1018 GetRequests, 979 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:31,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-07-20 11:15:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 229. [2020-07-20 11:15:31,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-07-20 11:15:31,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 463 transitions. [2020-07-20 11:15:31,501 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 463 transitions. Word has length 506 [2020-07-20 11:15:31,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:31,502 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 463 transitions. [2020-07-20 11:15:31,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:31,502 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 463 transitions. [2020-07-20 11:15:31,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2020-07-20 11:15:31,508 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:31,509 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 30, 29, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 13, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:31,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:31,710 INFO L427 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:31,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:31,711 INFO L82 PathProgramCache]: Analyzing trace with hash 267175368, now seen corresponding path program 32 times [2020-07-20 11:15:31,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:31,711 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279827930] [2020-07-20 11:15:31,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:32,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:32,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 1093 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:32,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:32,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6905 backedges. 296 proven. 946 refuted. 0 times theorem prover too weak. 5663 trivial. 0 not checked. [2020-07-20 11:15:32,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:35,551 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:36,358 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:36,359 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:36,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:36,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,043 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,176 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,247 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,352 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:37,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6905 backedges. 300 proven. 965 refuted. 0 times theorem prover too weak. 5640 trivial. 0 not checked. [2020-07-20 11:15:37,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279827930] [2020-07-20 11:15:37,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:37,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:37,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479458522] [2020-07-20 11:15:37,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:37,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:37,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:37,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:37,536 INFO L87 Difference]: Start difference. First operand 229 states and 463 transitions. Second operand 19 states. [2020-07-20 11:15:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:37,985 INFO L93 Difference]: Finished difference Result 298 states and 609 transitions. [2020-07-20 11:15:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:37,986 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 492 [2020-07-20 11:15:37,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:37,991 INFO L225 Difference]: With dead ends: 298 [2020-07-20 11:15:37,991 INFO L226 Difference]: Without dead ends: 232 [2020-07-20 11:15:37,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 990 GetRequests, 951 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-07-20 11:15:38,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 193. [2020-07-20 11:15:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-20 11:15:38,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 376 transitions. [2020-07-20 11:15:38,014 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 376 transitions. Word has length 492 [2020-07-20 11:15:38,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:38,015 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 376 transitions. [2020-07-20 11:15:38,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:38,015 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 376 transitions. [2020-07-20 11:15:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2020-07-20 11:15:38,021 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:38,022 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 25, 25, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 10, 9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:38,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:38,236 INFO L427 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:38,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1103192002, now seen corresponding path program 33 times [2020-07-20 11:15:38,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:38,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015357968] [2020-07-20 11:15:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:38,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 967 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:15:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:39,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 869 proven. 211 refuted. 0 times theorem prover too weak. 4272 trivial. 0 not checked. [2020-07-20 11:15:39,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:41,153 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:41,705 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,086 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,087 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,303 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,432 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,433 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,512 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:42,848 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:43,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5352 backedges. 871 proven. 230 refuted. 0 times theorem prover too weak. 4251 trivial. 0 not checked. [2020-07-20 11:15:43,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015357968] [2020-07-20 11:15:43,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:43,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:15:43,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151950043] [2020-07-20 11:15:43,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:15:43,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:43,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:15:43,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:15:43,757 INFO L87 Difference]: Start difference. First operand 193 states and 376 transitions. Second operand 19 states. [2020-07-20 11:15:44,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:44,255 INFO L93 Difference]: Finished difference Result 260 states and 504 transitions. [2020-07-20 11:15:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:15:44,255 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 435 [2020-07-20 11:15:44,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:44,259 INFO L225 Difference]: With dead ends: 260 [2020-07-20 11:15:44,259 INFO L226 Difference]: Without dead ends: 245 [2020-07-20 11:15:44,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 837 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:15:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-07-20 11:15:44,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 210. [2020-07-20 11:15:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-07-20 11:15:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 400 transitions. [2020-07-20 11:15:44,278 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 400 transitions. Word has length 435 [2020-07-20 11:15:44,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:44,279 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 400 transitions. [2020-07-20 11:15:44,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:15:44,279 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 400 transitions. [2020-07-20 11:15:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2020-07-20 11:15:44,286 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:44,286 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 31, 31, 27, 24, 17, 17, 17, 17, 17, 17, 17, 15, 15, 15, 15, 15, 15, 15, 12, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:44,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:44,500 INFO L427 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash -887222447, now seen corresponding path program 34 times [2020-07-20 11:15:44,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:44,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099321108] [2020-07-20 11:15:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:45,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:15:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:45,363 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 599 proven. 175 refuted. 0 times theorem prover too weak. 4921 trivial. 0 not checked. [2020-07-20 11:15:45,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:15:46,584 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:46,957 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:46,958 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:47,098 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:47,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:47,170 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:47,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:47,292 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:47,614 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:15:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 5695 backedges. 599 proven. 185 refuted. 0 times theorem prover too weak. 4911 trivial. 0 not checked. [2020-07-20 11:15:48,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099321108] [2020-07-20 11:15:48,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:15:48,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:15:48,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704998702] [2020-07-20 11:15:48,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:15:48,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:15:48,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:15:48,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:15:48,554 INFO L87 Difference]: Start difference. First operand 210 states and 400 transitions. Second operand 15 states. [2020-07-20 11:15:48,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:15:48,855 INFO L93 Difference]: Finished difference Result 244 states and 466 transitions. [2020-07-20 11:15:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:15:48,856 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 448 [2020-07-20 11:15:48,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:15:48,860 INFO L225 Difference]: With dead ends: 244 [2020-07-20 11:15:48,860 INFO L226 Difference]: Without dead ends: 229 [2020-07-20 11:15:48,861 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 871 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:15:48,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-07-20 11:15:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 205. [2020-07-20 11:15:48,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-20 11:15:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 384 transitions. [2020-07-20 11:15:48,879 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 384 transitions. Word has length 448 [2020-07-20 11:15:48,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:15:48,880 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 384 transitions. [2020-07-20 11:15:48,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:15:48,880 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 384 transitions. [2020-07-20 11:15:48,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2020-07-20 11:15:48,884 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:15:48,885 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 27, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:15:49,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:49,100 INFO L427 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:15:49,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:15:49,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1326629730, now seen corresponding path program 35 times [2020-07-20 11:15:49,101 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:15:49,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198801280] [2020-07-20 11:15:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:15:49,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:15:49,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 271 conjunts are in the unsatisfiable core [2020-07-20 11:15:49,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:15:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-20 11:15:51,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6082 backedges. 0 proven. 2033 refuted. 0 times theorem prover too weak. 4049 trivial. 0 not checked. [2020-07-20 11:16:00,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198801280] [2020-07-20 11:16:00,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:00,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 52 [2020-07-20 11:16:00,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419163869] [2020-07-20 11:16:00,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-07-20 11:16:00,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:00,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-07-20 11:16:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 11:16:00,627 INFO L87 Difference]: Start difference. First operand 205 states and 384 transitions. Second operand 52 states. [2020-07-20 11:16:03,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:03,406 INFO L93 Difference]: Finished difference Result 578 states and 1491 transitions. [2020-07-20 11:16:03,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-07-20 11:16:03,408 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 463 [2020-07-20 11:16:03,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:03,431 INFO L225 Difference]: With dead ends: 578 [2020-07-20 11:16:03,431 INFO L226 Difference]: Without dead ends: 571 [2020-07-20 11:16:03,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 936 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=169, Invalid=3737, Unknown=0, NotChecked=0, Total=3906 [2020-07-20 11:16:03,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2020-07-20 11:16:03,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 367. [2020-07-20 11:16:03,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 367 states. [2020-07-20 11:16:03,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 981 transitions. [2020-07-20 11:16:03,520 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 981 transitions. Word has length 463 [2020-07-20 11:16:03,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:03,520 INFO L479 AbstractCegarLoop]: Abstraction has 367 states and 981 transitions. [2020-07-20 11:16:03,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-07-20 11:16:03,520 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 981 transitions. [2020-07-20 11:16:03,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-07-20 11:16:03,529 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:03,529 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 30, 28, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:03,729 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:03,730 INFO L427 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:03,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash -886698700, now seen corresponding path program 36 times [2020-07-20 11:16:03,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:03,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1432424252] [2020-07-20 11:16:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:04,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:04,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:16:04,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 406 proven. 887 refuted. 0 times theorem prover too weak. 6324 trivial. 0 not checked. [2020-07-20 11:16:04,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:08,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:09,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:09,221 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:09,598 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:09,879 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:09,880 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:10,029 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:10,030 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:10,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:10,158 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:10,293 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:10,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 412 proven. 902 refuted. 0 times theorem prover too weak. 6303 trivial. 0 not checked. [2020-07-20 11:16:10,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1432424252] [2020-07-20 11:16:10,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:10,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:16:10,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259771985] [2020-07-20 11:16:10,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:16:10,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:10,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:16:10,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:16:10,665 INFO L87 Difference]: Start difference. First operand 367 states and 981 transitions. Second operand 19 states. [2020-07-20 11:16:11,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:11,214 INFO L93 Difference]: Finished difference Result 453 states and 1209 transitions. [2020-07-20 11:16:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:16:11,216 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 515 [2020-07-20 11:16:11,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:11,225 INFO L225 Difference]: With dead ends: 453 [2020-07-20 11:16:11,226 INFO L226 Difference]: Without dead ends: 428 [2020-07-20 11:16:11,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 997 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:16:11,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-07-20 11:16:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 379. [2020-07-20 11:16:11,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-07-20 11:16:11,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1032 transitions. [2020-07-20 11:16:11,297 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1032 transitions. Word has length 515 [2020-07-20 11:16:11,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:11,297 INFO L479 AbstractCegarLoop]: Abstraction has 379 states and 1032 transitions. [2020-07-20 11:16:11,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:16:11,298 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1032 transitions. [2020-07-20 11:16:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2020-07-20 11:16:11,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:11,312 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 26, 25, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 14, 10, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:11,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:11,523 INFO L427 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:11,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:11,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1392308682, now seen corresponding path program 37 times [2020-07-20 11:16:11,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:11,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684377546] [2020-07-20 11:16:11,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:12,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:16:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 717 proven. 189 refuted. 0 times theorem prover too weak. 6523 trivial. 0 not checked. [2020-07-20 11:16:12,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:13,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:13,735 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:14,150 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:14,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:14,316 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:14,424 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:14,543 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:14,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:16,240 INFO L134 CoverageAnalysis]: Checked inductivity of 7429 backedges. 717 proven. 201 refuted. 0 times theorem prover too weak. 6511 trivial. 0 not checked. [2020-07-20 11:16:16,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684377546] [2020-07-20 11:16:16,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:16,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:16:16,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194809227] [2020-07-20 11:16:16,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:16:16,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:16,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:16:16,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:16:16,242 INFO L87 Difference]: Start difference. First operand 379 states and 1032 transitions. Second operand 15 states. [2020-07-20 11:16:16,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:16,656 INFO L93 Difference]: Finished difference Result 506 states and 1500 transitions. [2020-07-20 11:16:16,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:16:16,657 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 508 [2020-07-20 11:16:16,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:16,669 INFO L225 Difference]: With dead ends: 506 [2020-07-20 11:16:16,669 INFO L226 Difference]: Without dead ends: 483 [2020-07-20 11:16:16,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1020 GetRequests, 991 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:16:16,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2020-07-20 11:16:16,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 376. [2020-07-20 11:16:16,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-07-20 11:16:16,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 1023 transitions. [2020-07-20 11:16:16,747 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 1023 transitions. Word has length 508 [2020-07-20 11:16:16,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:16,748 INFO L479 AbstractCegarLoop]: Abstraction has 376 states and 1023 transitions. [2020-07-20 11:16:16,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:16:16,748 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 1023 transitions. [2020-07-20 11:16:16,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2020-07-20 11:16:16,761 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:16,761 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 30, 28, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:16,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:16,975 INFO L427 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:16,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:16,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1173766470, now seen corresponding path program 38 times [2020-07-20 11:16:16,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:16,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988643154] [2020-07-20 11:16:16,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:17,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 1145 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:16:17,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:17,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 724 proven. 201 refuted. 0 times theorem prover too weak. 6692 trivial. 0 not checked. [2020-07-20 11:16:17,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:19,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:19,632 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:19,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:20,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:20,053 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:20,191 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:20,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:21,853 INFO L134 CoverageAnalysis]: Checked inductivity of 7617 backedges. 728 proven. 207 refuted. 0 times theorem prover too weak. 6682 trivial. 0 not checked. [2020-07-20 11:16:21,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988643154] [2020-07-20 11:16:21,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:21,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:16:21,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396997415] [2020-07-20 11:16:21,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:16:21,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:21,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:16:21,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:16:21,855 INFO L87 Difference]: Start difference. First operand 376 states and 1023 transitions. Second operand 15 states. [2020-07-20 11:16:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:22,219 INFO L93 Difference]: Finished difference Result 460 states and 1365 transitions. [2020-07-20 11:16:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:16:22,221 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 515 [2020-07-20 11:16:22,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:22,230 INFO L225 Difference]: With dead ends: 460 [2020-07-20 11:16:22,230 INFO L226 Difference]: Without dead ends: 441 [2020-07-20 11:16:22,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1005 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:16:22,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-07-20 11:16:22,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 387. [2020-07-20 11:16:22,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-07-20 11:16:22,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1056 transitions. [2020-07-20 11:16:22,285 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1056 transitions. Word has length 515 [2020-07-20 11:16:22,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:22,285 INFO L479 AbstractCegarLoop]: Abstraction has 387 states and 1056 transitions. [2020-07-20 11:16:22,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:16:22,285 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1056 transitions. [2020-07-20 11:16:22,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2020-07-20 11:16:22,299 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:22,299 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 34, 29, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 15, 10, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:22,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:22,507 INFO L427 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:22,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:22,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1970533656, now seen corresponding path program 39 times [2020-07-20 11:16:22,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:22,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118567321] [2020-07-20 11:16:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:23,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:16:23,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:23,589 INFO L134 CoverageAnalysis]: Checked inductivity of 8495 backedges. 402 proven. 790 refuted. 0 times theorem prover too weak. 7303 trivial. 0 not checked. [2020-07-20 11:16:23,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:26,387 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,255 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,521 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,522 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,659 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,736 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,737 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:27,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:28,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 8495 backedges. 408 proven. 800 refuted. 0 times theorem prover too weak. 7287 trivial. 0 not checked. [2020-07-20 11:16:28,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118567321] [2020-07-20 11:16:28,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:28,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:28,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060420834] [2020-07-20 11:16:28,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:28,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:28,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:28,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:28,444 INFO L87 Difference]: Start difference. First operand 387 states and 1056 transitions. Second operand 17 states. [2020-07-20 11:16:28,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:28,942 INFO L93 Difference]: Finished difference Result 493 states and 1412 transitions. [2020-07-20 11:16:28,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:28,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 544 [2020-07-20 11:16:28,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:28,957 INFO L225 Difference]: With dead ends: 493 [2020-07-20 11:16:28,957 INFO L226 Difference]: Without dead ends: 459 [2020-07-20 11:16:28,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1059 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:28,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2020-07-20 11:16:29,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 393. [2020-07-20 11:16:29,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-07-20 11:16:29,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1087 transitions. [2020-07-20 11:16:29,033 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1087 transitions. Word has length 544 [2020-07-20 11:16:29,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:29,033 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 1087 transitions. [2020-07-20 11:16:29,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:29,033 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1087 transitions. [2020-07-20 11:16:29,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2020-07-20 11:16:29,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:29,047 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 30, 28, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 11, 11, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:29,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:29,262 INFO L427 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:29,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:29,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1211029849, now seen corresponding path program 40 times [2020-07-20 11:16:29,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:29,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56708141] [2020-07-20 11:16:29,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:30,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:30,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:16:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 521 proven. 626 refuted. 0 times theorem prover too weak. 6810 trivial. 0 not checked. [2020-07-20 11:16:30,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:33,244 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:33,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:33,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,287 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,339 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,378 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:34,615 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:35,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 525 proven. 638 refuted. 0 times theorem prover too weak. 6794 trivial. 0 not checked. [2020-07-20 11:16:35,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56708141] [2020-07-20 11:16:35,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:35,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:35,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937313737] [2020-07-20 11:16:35,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:35,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:35,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:35,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:35,293 INFO L87 Difference]: Start difference. First operand 393 states and 1087 transitions. Second operand 17 states. [2020-07-20 11:16:35,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:35,885 INFO L93 Difference]: Finished difference Result 507 states and 1435 transitions. [2020-07-20 11:16:35,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:35,887 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 527 [2020-07-20 11:16:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:35,897 INFO L225 Difference]: With dead ends: 507 [2020-07-20 11:16:35,898 INFO L226 Difference]: Without dead ends: 489 [2020-07-20 11:16:35,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1059 GetRequests, 1025 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:35,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2020-07-20 11:16:35,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 393. [2020-07-20 11:16:35,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 393 states. [2020-07-20 11:16:35,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 1087 transitions. [2020-07-20 11:16:35,968 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 1087 transitions. Word has length 527 [2020-07-20 11:16:35,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:35,968 INFO L479 AbstractCegarLoop]: Abstraction has 393 states and 1087 transitions. [2020-07-20 11:16:35,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 1087 transitions. [2020-07-20 11:16:35,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-07-20 11:16:35,978 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:35,979 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 28, 25, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:36,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:36,186 INFO L427 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:36,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:36,187 INFO L82 PathProgramCache]: Analyzing trace with hash 2131397325, now seen corresponding path program 41 times [2020-07-20 11:16:36,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:36,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535680617] [2020-07-20 11:16:36,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:36,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:36,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:16:36,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:37,277 INFO L134 CoverageAnalysis]: Checked inductivity of 7098 backedges. 592 proven. 488 refuted. 0 times theorem prover too weak. 6018 trivial. 0 not checked. [2020-07-20 11:16:37,277 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:40,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:40,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:40,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:40,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:40,918 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:41,008 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:41,064 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:41,132 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:41,461 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:42,293 INFO L134 CoverageAnalysis]: Checked inductivity of 7098 backedges. 596 proven. 500 refuted. 0 times theorem prover too weak. 6002 trivial. 0 not checked. [2020-07-20 11:16:42,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535680617] [2020-07-20 11:16:42,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:42,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:42,294 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314180407] [2020-07-20 11:16:42,294 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:42,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:42,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:42,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:42,295 INFO L87 Difference]: Start difference. First operand 393 states and 1087 transitions. Second operand 17 states. [2020-07-20 11:16:42,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:42,836 INFO L93 Difference]: Finished difference Result 497 states and 1431 transitions. [2020-07-20 11:16:42,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:42,838 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 498 [2020-07-20 11:16:42,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:42,849 INFO L225 Difference]: With dead ends: 497 [2020-07-20 11:16:42,849 INFO L226 Difference]: Without dead ends: 473 [2020-07-20 11:16:42,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2020-07-20 11:16:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 386. [2020-07-20 11:16:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 386 states. [2020-07-20 11:16:42,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1041 transitions. [2020-07-20 11:16:42,923 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1041 transitions. Word has length 498 [2020-07-20 11:16:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:42,923 INFO L479 AbstractCegarLoop]: Abstraction has 386 states and 1041 transitions. [2020-07-20 11:16:42,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:42,923 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1041 transitions. [2020-07-20 11:16:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-07-20 11:16:42,932 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:42,932 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 38, 38, 31, 26, 20, 20, 20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 15, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:43,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:43,133 INFO L427 AbstractCegarLoop]: === Iteration 59 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:43,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:43,134 INFO L82 PathProgramCache]: Analyzing trace with hash 951177996, now seen corresponding path program 42 times [2020-07-20 11:16:43,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:43,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [776895367] [2020-07-20 11:16:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:43,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:43,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:16:43,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 838 proven. 332 refuted. 0 times theorem prover too weak. 7156 trivial. 0 not checked. [2020-07-20 11:16:44,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:46,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:47,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:47,504 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:47,618 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:47,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:47,719 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:47,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:48,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 842 proven. 344 refuted. 0 times theorem prover too weak. 7140 trivial. 0 not checked. [2020-07-20 11:16:49,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [776895367] [2020-07-20 11:16:49,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:49,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:49,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378679083] [2020-07-20 11:16:49,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:49,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:49,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:49,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:49,509 INFO L87 Difference]: Start difference. First operand 386 states and 1041 transitions. Second operand 17 states. [2020-07-20 11:16:50,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:50,064 INFO L93 Difference]: Finished difference Result 483 states and 1292 transitions. [2020-07-20 11:16:50,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:50,064 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 538 [2020-07-20 11:16:50,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:50,079 INFO L225 Difference]: With dead ends: 483 [2020-07-20 11:16:50,079 INFO L226 Difference]: Without dead ends: 468 [2020-07-20 11:16:50,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1081 GetRequests, 1047 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:50,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-07-20 11:16:50,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 374. [2020-07-20 11:16:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-07-20 11:16:50,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 960 transitions. [2020-07-20 11:16:50,161 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 960 transitions. Word has length 538 [2020-07-20 11:16:50,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:50,162 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 960 transitions. [2020-07-20 11:16:50,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:50,162 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 960 transitions. [2020-07-20 11:16:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 11:16:50,182 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:50,183 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 28, 25, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 12, 10, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:50,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:50,399 INFO L427 AbstractCegarLoop]: === Iteration 60 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:50,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:50,399 INFO L82 PathProgramCache]: Analyzing trace with hash 273481678, now seen corresponding path program 43 times [2020-07-20 11:16:50,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:50,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084599674] [2020-07-20 11:16:50,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:51,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:16:51,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:51,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 935 proven. 119 refuted. 0 times theorem prover too weak. 5712 trivial. 0 not checked. [2020-07-20 11:16:51,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:53,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:53,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:53,765 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:54,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:54,186 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:54,187 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:54,270 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:54,329 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:54,446 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:55,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:56,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 937 proven. 133 refuted. 0 times theorem prover too weak. 5696 trivial. 0 not checked. [2020-07-20 11:16:56,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084599674] [2020-07-20 11:16:56,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:16:56,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:16:56,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83656614] [2020-07-20 11:16:56,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:16:56,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:16:56,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:16:56,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:16:56,484 INFO L87 Difference]: Start difference. First operand 374 states and 960 transitions. Second operand 17 states. [2020-07-20 11:16:57,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:16:57,029 INFO L93 Difference]: Finished difference Result 475 states and 1219 transitions. [2020-07-20 11:16:57,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:16:57,032 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 486 [2020-07-20 11:16:57,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:16:57,045 INFO L225 Difference]: With dead ends: 475 [2020-07-20 11:16:57,045 INFO L226 Difference]: Without dead ends: 456 [2020-07-20 11:16:57,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:16:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2020-07-20 11:16:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 374. [2020-07-20 11:16:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 374 states. [2020-07-20 11:16:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 942 transitions. [2020-07-20 11:16:57,123 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 942 transitions. Word has length 486 [2020-07-20 11:16:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:16:57,124 INFO L479 AbstractCegarLoop]: Abstraction has 374 states and 942 transitions. [2020-07-20 11:16:57,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:16:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 942 transitions. [2020-07-20 11:16:57,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 11:16:57,139 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:16:57,139 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 35, 35, 28, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 11, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:16:57,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:57,355 INFO L427 AbstractCegarLoop]: === Iteration 61 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:16:57,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:16:57,356 INFO L82 PathProgramCache]: Analyzing trace with hash 1318303437, now seen corresponding path program 44 times [2020-07-20 11:16:57,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:16:57,356 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221085493] [2020-07-20 11:16:57,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:16:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:16:58,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:16:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:16:58,380 INFO L134 CoverageAnalysis]: Checked inductivity of 7149 backedges. 714 proven. 160 refuted. 0 times theorem prover too weak. 6275 trivial. 0 not checked. [2020-07-20 11:16:58,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:16:59,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:16:59,875 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,177 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,178 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,430 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,590 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:00,723 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:01,323 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7149 backedges. 716 proven. 168 refuted. 0 times theorem prover too weak. 6265 trivial. 0 not checked. [2020-07-20 11:17:02,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221085493] [2020-07-20 11:17:02,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:02,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:17:02,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722830212] [2020-07-20 11:17:02,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:17:02,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:02,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:17:02,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:17:02,809 INFO L87 Difference]: Start difference. First operand 374 states and 942 transitions. Second operand 15 states. [2020-07-20 11:17:03,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:03,269 INFO L93 Difference]: Finished difference Result 428 states and 1077 transitions. [2020-07-20 11:17:03,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:17:03,271 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 500 [2020-07-20 11:17:03,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:03,279 INFO L225 Difference]: With dead ends: 428 [2020-07-20 11:17:03,279 INFO L226 Difference]: Without dead ends: 409 [2020-07-20 11:17:03,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 975 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:17:03,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2020-07-20 11:17:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 339. [2020-07-20 11:17:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-07-20 11:17:03,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 806 transitions. [2020-07-20 11:17:03,334 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 806 transitions. Word has length 500 [2020-07-20 11:17:03,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:03,334 INFO L479 AbstractCegarLoop]: Abstraction has 339 states and 806 transitions. [2020-07-20 11:17:03,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:17:03,335 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 806 transitions. [2020-07-20 11:17:03,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 510 [2020-07-20 11:17:03,342 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:03,343 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 26, 26, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:03,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:03,544 INFO L427 AbstractCegarLoop]: === Iteration 62 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1000706866, now seen corresponding path program 45 times [2020-07-20 11:17:03,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:03,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547175084] [2020-07-20 11:17:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:04,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:04,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:17:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:04,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7422 backedges. 862 proven. 218 refuted. 0 times theorem prover too weak. 6342 trivial. 0 not checked. [2020-07-20 11:17:04,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:07,049 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:07,677 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:07,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:07,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:08,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:08,131 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:08,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:08,373 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:08,975 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7422 backedges. 866 proven. 230 refuted. 0 times theorem prover too weak. 6326 trivial. 0 not checked. [2020-07-20 11:17:10,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547175084] [2020-07-20 11:17:10,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:10,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:17:10,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600884242] [2020-07-20 11:17:10,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:17:10,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:10,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:17:10,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:17:10,598 INFO L87 Difference]: Start difference. First operand 339 states and 806 transitions. Second operand 17 states. [2020-07-20 11:17:11,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:11,201 INFO L93 Difference]: Finished difference Result 370 states and 860 transitions. [2020-07-20 11:17:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:17:11,204 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 509 [2020-07-20 11:17:11,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:11,210 INFO L225 Difference]: With dead ends: 370 [2020-07-20 11:17:11,210 INFO L226 Difference]: Without dead ends: 355 [2020-07-20 11:17:11,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 989 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:17:11,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-20 11:17:11,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 336. [2020-07-20 11:17:11,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-07-20 11:17:11,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 791 transitions. [2020-07-20 11:17:11,246 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 791 transitions. Word has length 509 [2020-07-20 11:17:11,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:11,247 INFO L479 AbstractCegarLoop]: Abstraction has 336 states and 791 transitions. [2020-07-20 11:17:11,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:17:11,247 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 791 transitions. [2020-07-20 11:17:11,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 11:17:11,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:11,255 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:11,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:11,455 INFO L427 AbstractCegarLoop]: === Iteration 63 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:11,456 INFO L82 PathProgramCache]: Analyzing trace with hash 816866430, now seen corresponding path program 46 times [2020-07-20 11:17:11,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:11,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [190015920] [2020-07-20 11:17:11,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:12,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:17:12,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:12,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 970 proven. 248 refuted. 0 times theorem prover too weak. 5540 trivial. 0 not checked. [2020-07-20 11:17:12,639 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:15,431 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:16,337 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:16,761 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:17,047 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:17,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:17,332 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:17,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:17,467 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:17,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:19,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 970 proven. 271 refuted. 0 times theorem prover too weak. 5517 trivial. 0 not checked. [2020-07-20 11:17:19,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [190015920] [2020-07-20 11:17:19,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:19,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:17:19,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839829752] [2020-07-20 11:17:19,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:17:19,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:19,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:17:19,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:17:19,400 INFO L87 Difference]: Start difference. First operand 336 states and 791 transitions. Second operand 19 states. [2020-07-20 11:17:20,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:20,145 INFO L93 Difference]: Finished difference Result 381 states and 924 transitions. [2020-07-20 11:17:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:17:20,145 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-20 11:17:20,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:20,152 INFO L225 Difference]: With dead ends: 381 [2020-07-20 11:17:20,152 INFO L226 Difference]: Without dead ends: 358 [2020-07-20 11:17:20,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 941 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:17:20,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-07-20 11:17:20,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 334. [2020-07-20 11:17:20,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 334 states. [2020-07-20 11:17:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 783 transitions. [2020-07-20 11:17:20,191 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 783 transitions. Word has length 487 [2020-07-20 11:17:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:20,192 INFO L479 AbstractCegarLoop]: Abstraction has 334 states and 783 transitions. [2020-07-20 11:17:20,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:17:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 783 transitions. [2020-07-20 11:17:20,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2020-07-20 11:17:20,199 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:20,200 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 27, 26, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:20,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:20,401 INFO L427 AbstractCegarLoop]: === Iteration 64 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:20,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:20,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1351993790, now seen corresponding path program 47 times [2020-07-20 11:17:20,402 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:20,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450384941] [2020-07-20 11:17:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:21,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 1081 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:17:21,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:21,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6764 backedges. 579 proven. 122 refuted. 0 times theorem prover too weak. 6063 trivial. 0 not checked. [2020-07-20 11:17:21,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:22,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:22,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:23,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:23,159 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:23,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:23,253 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:23,362 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:23,576 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:24,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6764 backedges. 579 proven. 129 refuted. 0 times theorem prover too weak. 6056 trivial. 0 not checked. [2020-07-20 11:17:25,793 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450384941] [2020-07-20 11:17:25,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:25,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 13 [2020-07-20 11:17:25,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690476435] [2020-07-20 11:17:25,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:17:25,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:25,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:17:25,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-07-20 11:17:25,795 INFO L87 Difference]: Start difference. First operand 334 states and 783 transitions. Second operand 13 states. [2020-07-20 11:17:26,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:26,188 INFO L93 Difference]: Finished difference Result 411 states and 1095 transitions. [2020-07-20 11:17:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 11:17:26,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 486 [2020-07-20 11:17:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:26,200 INFO L225 Difference]: With dead ends: 411 [2020-07-20 11:17:26,200 INFO L226 Difference]: Without dead ends: 398 [2020-07-20 11:17:26,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 975 GetRequests, 951 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:17:26,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-07-20 11:17:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 331. [2020-07-20 11:17:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-07-20 11:17:26,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 778 transitions. [2020-07-20 11:17:26,258 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 778 transitions. Word has length 486 [2020-07-20 11:17:26,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:26,259 INFO L479 AbstractCegarLoop]: Abstraction has 331 states and 778 transitions. [2020-07-20 11:17:26,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:17:26,259 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 778 transitions. [2020-07-20 11:17:26,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 513 [2020-07-20 11:17:26,267 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:26,267 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 28, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 10, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:26,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:26,468 INFO L427 AbstractCegarLoop]: === Iteration 65 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:26,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:26,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1656229158, now seen corresponding path program 48 times [2020-07-20 11:17:26,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:26,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516016338] [2020-07-20 11:17:26,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:27,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:27,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 1139 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:17:27,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:27,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 1033 proven. 139 refuted. 0 times theorem prover too weak. 6329 trivial. 0 not checked. [2020-07-20 11:17:27,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:30,125 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:30,126 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:30,637 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:30,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:30,980 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:30,981 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:31,199 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:31,335 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:31,336 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:31,493 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:31,691 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:32,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 7501 backedges. 1033 proven. 155 refuted. 0 times theorem prover too weak. 6313 trivial. 0 not checked. [2020-07-20 11:17:34,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516016338] [2020-07-20 11:17:34,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:34,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:17:34,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170867388] [2020-07-20 11:17:34,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:17:34,032 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:34,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:17:34,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:17:34,032 INFO L87 Difference]: Start difference. First operand 331 states and 778 transitions. Second operand 17 states. [2020-07-20 11:17:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:34,642 INFO L93 Difference]: Finished difference Result 347 states and 795 transitions. [2020-07-20 11:17:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:17:34,642 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 512 [2020-07-20 11:17:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:34,647 INFO L225 Difference]: With dead ends: 347 [2020-07-20 11:17:34,648 INFO L226 Difference]: Without dead ends: 328 [2020-07-20 11:17:34,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1029 GetRequests, 995 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:17:34,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-07-20 11:17:34,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 322. [2020-07-20 11:17:34,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-07-20 11:17:34,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 744 transitions. [2020-07-20 11:17:34,684 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 744 transitions. Word has length 512 [2020-07-20 11:17:34,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:34,685 INFO L479 AbstractCegarLoop]: Abstraction has 322 states and 744 transitions. [2020-07-20 11:17:34,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:17:34,685 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 744 transitions. [2020-07-20 11:17:34,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 11:17:34,692 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:34,692 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 33, 33, 27, 27, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 13, 11, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:34,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:34,893 INFO L427 AbstractCegarLoop]: === Iteration 66 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:34,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:34,894 INFO L82 PathProgramCache]: Analyzing trace with hash 2026174201, now seen corresponding path program 49 times [2020-07-20 11:17:34,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:34,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103325998] [2020-07-20 11:17:34,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:35,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 11:17:35,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7174 backedges. 333 proven. 975 refuted. 0 times theorem prover too weak. 5866 trivial. 0 not checked. [2020-07-20 11:17:36,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:40,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:41,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:41,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:42,854 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,226 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,475 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,629 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:43,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 7174 backedges. 332 proven. 997 refuted. 0 times theorem prover too weak. 5845 trivial. 0 not checked. [2020-07-20 11:17:44,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103325998] [2020-07-20 11:17:44,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:44,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 11:17:44,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051476073] [2020-07-20 11:17:44,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:17:44,090 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:44,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:17:44,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:17:44,091 INFO L87 Difference]: Start difference. First operand 322 states and 744 transitions. Second operand 21 states. [2020-07-20 11:17:44,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:44,963 INFO L93 Difference]: Finished difference Result 397 states and 949 transitions. [2020-07-20 11:17:44,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:17:44,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 499 [2020-07-20 11:17:44,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:44,974 INFO L225 Difference]: With dead ends: 397 [2020-07-20 11:17:44,974 INFO L226 Difference]: Without dead ends: 331 [2020-07-20 11:17:44,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 963 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:17:44,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2020-07-20 11:17:45,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 325. [2020-07-20 11:17:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-07-20 11:17:45,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 726 transitions. [2020-07-20 11:17:45,011 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 726 transitions. Word has length 499 [2020-07-20 11:17:45,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:45,012 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 726 transitions. [2020-07-20 11:17:45,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:17:45,012 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 726 transitions. [2020-07-20 11:17:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 11:17:45,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:45,020 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 35, 35, 27, 27, 20, 20, 20, 20, 20, 20, 20, 17, 17, 17, 17, 17, 17, 17, 13, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:45,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:45,221 INFO L427 AbstractCegarLoop]: === Iteration 67 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:45,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:45,221 INFO L82 PathProgramCache]: Analyzing trace with hash 413422812, now seen corresponding path program 50 times [2020-07-20 11:17:45,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:45,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100077204] [2020-07-20 11:17:45,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:46,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:46,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:17:46,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7506 backedges. 755 proven. 137 refuted. 0 times theorem prover too weak. 6614 trivial. 0 not checked. [2020-07-20 11:17:46,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:48,259 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:48,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:48,627 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:48,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:48,952 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:49,092 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:49,342 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:50,149 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 7506 backedges. 757 proven. 145 refuted. 0 times theorem prover too weak. 6604 trivial. 0 not checked. [2020-07-20 11:17:52,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100077204] [2020-07-20 11:17:52,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:17:52,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:17:52,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901375792] [2020-07-20 11:17:52,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:17:52,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:17:52,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:17:52,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:17:52,319 INFO L87 Difference]: Start difference. First operand 325 states and 726 transitions. Second operand 15 states. [2020-07-20 11:17:52,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:17:52,796 INFO L93 Difference]: Finished difference Result 394 states and 917 transitions. [2020-07-20 11:17:52,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:17:52,800 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 511 [2020-07-20 11:17:52,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:17:52,808 INFO L225 Difference]: With dead ends: 394 [2020-07-20 11:17:52,809 INFO L226 Difference]: Without dead ends: 381 [2020-07-20 11:17:52,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1026 GetRequests, 997 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:17:52,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2020-07-20 11:17:52,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 325. [2020-07-20 11:17:52,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-07-20 11:17:52,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 722 transitions. [2020-07-20 11:17:52,851 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 722 transitions. Word has length 511 [2020-07-20 11:17:52,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:17:52,851 INFO L479 AbstractCegarLoop]: Abstraction has 325 states and 722 transitions. [2020-07-20 11:17:52,851 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:17:52,851 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 722 transitions. [2020-07-20 11:17:52,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 11:17:52,859 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:17:52,859 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:17:53,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:53,060 INFO L427 AbstractCegarLoop]: === Iteration 68 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:17:53,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:17:53,061 INFO L82 PathProgramCache]: Analyzing trace with hash 751276626, now seen corresponding path program 51 times [2020-07-20 11:17:53,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:17:53,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707972751] [2020-07-20 11:17:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:17:53,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:17:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:17:53,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:17:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 831 proven. 214 refuted. 0 times theorem prover too weak. 5721 trivial. 0 not checked. [2020-07-20 11:17:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:17:56,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:56,544 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:57,300 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:57,301 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:57,624 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:57,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:57,834 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:57,943 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:58,013 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:58,095 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:17:58,730 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:00,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 831 proven. 234 refuted. 0 times theorem prover too weak. 5701 trivial. 0 not checked. [2020-07-20 11:18:00,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707972751] [2020-07-20 11:18:00,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:18:00,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:18:00,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129423178] [2020-07-20 11:18:00,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:18:00,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:18:00,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:18:00,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:18:00,695 INFO L87 Difference]: Start difference. First operand 325 states and 722 transitions. Second operand 17 states. [2020-07-20 11:18:01,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:18:01,395 INFO L93 Difference]: Finished difference Result 370 states and 814 transitions. [2020-07-20 11:18:01,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:18:01,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 487 [2020-07-20 11:18:01,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:18:01,402 INFO L225 Difference]: With dead ends: 370 [2020-07-20 11:18:01,402 INFO L226 Difference]: Without dead ends: 355 [2020-07-20 11:18:01,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 945 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:18:01,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-07-20 11:18:01,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 317. [2020-07-20 11:18:01,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-07-20 11:18:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 679 transitions. [2020-07-20 11:18:01,442 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 679 transitions. Word has length 487 [2020-07-20 11:18:01,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:18:01,443 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 679 transitions. [2020-07-20 11:18:01,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:18:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 679 transitions. [2020-07-20 11:18:01,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2020-07-20 11:18:01,453 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:18:01,453 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 35, 35, 28, 27, 22, 22, 22, 22, 22, 22, 22, 17, 17, 17, 17, 17, 17, 17, 17, 10, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:18:01,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:01,655 INFO L427 AbstractCegarLoop]: === Iteration 69 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:18:01,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:18:01,656 INFO L82 PathProgramCache]: Analyzing trace with hash 361286820, now seen corresponding path program 52 times [2020-07-20 11:18:01,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:18:01,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955803816] [2020-07-20 11:18:01,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:02,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:18:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:18:02,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:18:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8361 backedges. 944 proven. 210 refuted. 0 times theorem prover too weak. 7207 trivial. 0 not checked. [2020-07-20 11:18:02,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:18:05,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:05,680 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:06,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:06,699 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:06,978 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:07,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:07,106 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:07,357 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:08,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:10,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8361 backedges. 950 proven. 218 refuted. 0 times theorem prover too weak. 7193 trivial. 0 not checked. [2020-07-20 11:18:10,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955803816] [2020-07-20 11:18:10,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:18:10,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:18:10,208 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426748131] [2020-07-20 11:18:10,208 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:18:10,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:18:10,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:18:10,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:18:10,209 INFO L87 Difference]: Start difference. First operand 317 states and 679 transitions. Second operand 17 states. [2020-07-20 11:18:10,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:18:10,819 INFO L93 Difference]: Finished difference Result 350 states and 743 transitions. [2020-07-20 11:18:10,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:18:10,821 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 536 [2020-07-20 11:18:10,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:18:10,828 INFO L225 Difference]: With dead ends: 350 [2020-07-20 11:18:10,828 INFO L226 Difference]: Without dead ends: 337 [2020-07-20 11:18:10,831 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1077 GetRequests, 1043 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:18:10,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-07-20 11:18:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 301. [2020-07-20 11:18:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-07-20 11:18:10,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 643 transitions. [2020-07-20 11:18:10,869 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 643 transitions. Word has length 536 [2020-07-20 11:18:10,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:18:10,870 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 643 transitions. [2020-07-20 11:18:10,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:18:10,870 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 643 transitions. [2020-07-20 11:18:10,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 11:18:10,877 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:18:10,877 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 28, 27, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:18:11,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:11,078 INFO L427 AbstractCegarLoop]: === Iteration 70 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:18:11,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:18:11,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1450285071, now seen corresponding path program 53 times [2020-07-20 11:18:11,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:18:11,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966930866] [2020-07-20 11:18:11,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:18:12,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:18:12,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:18:12,379 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 780 proven. 123 refuted. 0 times theorem prover too weak. 6234 trivial. 0 not checked. [2020-07-20 11:18:12,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:18:14,453 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:14,454 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:14,866 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:15,108 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:15,109 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:15,241 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:15,324 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:15,386 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:15,647 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:16,621 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 780 proven. 135 refuted. 0 times theorem prover too weak. 6222 trivial. 0 not checked. [2020-07-20 11:18:18,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966930866] [2020-07-20 11:18:18,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:18:18,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2020-07-20 11:18:18,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723929471] [2020-07-20 11:18:18,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 11:18:18,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:18:18,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 11:18:18,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2020-07-20 11:18:18,489 INFO L87 Difference]: Start difference. First operand 301 states and 643 transitions. Second operand 15 states. [2020-07-20 11:18:18,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:18:18,998 INFO L93 Difference]: Finished difference Result 317 states and 659 transitions. [2020-07-20 11:18:18,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 11:18:18,998 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 500 [2020-07-20 11:18:18,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:18:19,004 INFO L225 Difference]: With dead ends: 317 [2020-07-20 11:18:19,004 INFO L226 Difference]: Without dead ends: 304 [2020-07-20 11:18:19,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 975 SyntacticMatches, 11 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2020-07-20 11:18:19,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-07-20 11:18:19,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2020-07-20 11:18:19,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-20 11:18:19,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 637 transitions. [2020-07-20 11:18:19,039 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 637 transitions. Word has length 500 [2020-07-20 11:18:19,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:18:19,040 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 637 transitions. [2020-07-20 11:18:19,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 11:18:19,040 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 637 transitions. [2020-07-20 11:18:19,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2020-07-20 11:18:19,047 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:18:19,047 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 34, 34, 27, 27, 19, 19, 19, 19, 19, 19, 19, 17, 17, 17, 17, 17, 17, 17, 12, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:18:19,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:19,249 INFO L427 AbstractCegarLoop]: === Iteration 71 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:18:19,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:18:19,250 INFO L82 PathProgramCache]: Analyzing trace with hash -949503063, now seen corresponding path program 54 times [2020-07-20 11:18:19,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:18:19,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832123806] [2020-07-20 11:18:19,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:18:20,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:18:20,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:18:20,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 305 proven. 836 refuted. 0 times theorem prover too weak. 5997 trivial. 0 not checked. [2020-07-20 11:18:20,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:18:25,179 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:26,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:26,725 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:27,310 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-07-20 11:18:27,850 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:28,201 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:28,202 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:28,412 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:28,635 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:28,782 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7138 backedges. 309 proven. 846 refuted. 0 times theorem prover too weak. 5983 trivial. 0 not checked. [2020-07-20 11:18:29,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832123806] [2020-07-20 11:18:29,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:18:29,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:18:29,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997910085] [2020-07-20 11:18:29,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:18:29,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:18:29,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:18:29,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:18:29,110 INFO L87 Difference]: Start difference. First operand 298 states and 637 transitions. Second operand 19 states. [2020-07-20 11:18:30,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:18:30,066 INFO L93 Difference]: Finished difference Result 406 states and 878 transitions. [2020-07-20 11:18:30,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:18:30,070 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 499 [2020-07-20 11:18:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:18:30,080 INFO L225 Difference]: With dead ends: 406 [2020-07-20 11:18:30,080 INFO L226 Difference]: Without dead ends: 325 [2020-07-20 11:18:30,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1003 GetRequests, 967 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:18:30,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-07-20 11:18:30,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 298. [2020-07-20 11:18:30,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-07-20 11:18:30,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 617 transitions. [2020-07-20 11:18:30,120 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 617 transitions. Word has length 499 [2020-07-20 11:18:30,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:18:30,120 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 617 transitions. [2020-07-20 11:18:30,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:18:30,121 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 617 transitions. [2020-07-20 11:18:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 11:18:30,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:18:30,128 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 36, 36, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:18:30,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:30,329 INFO L427 AbstractCegarLoop]: === Iteration 72 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:18:30,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:18:30,330 INFO L82 PathProgramCache]: Analyzing trace with hash 946974052, now seen corresponding path program 55 times [2020-07-20 11:18:30,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:18:30,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146597139] [2020-07-20 11:18:30,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:18:31,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 11:18:31,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:18:31,755 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 290 proven. 1058 refuted. 0 times theorem prover too weak. 6134 trivial. 0 not checked. [2020-07-20 11:18:31,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:18:33,969 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:18:34,404 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 31 [2020-07-20 11:18:37,832 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:39,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:39,886 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:41,174 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:41,175 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:41,863 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:41,864 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:42,214 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:42,215 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:42,457 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:42,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 291 proven. 1078 refuted. 0 times theorem prover too weak. 6113 trivial. 0 not checked. [2020-07-20 11:18:43,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146597139] [2020-07-20 11:18:43,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:18:43,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 11:18:43,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076078166] [2020-07-20 11:18:43,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:18:43,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:18:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:18:43,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:18:43,105 INFO L87 Difference]: Start difference. First operand 298 states and 617 transitions. Second operand 21 states. [2020-07-20 11:18:44,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:18:44,440 INFO L93 Difference]: Finished difference Result 483 states and 1011 transitions. [2020-07-20 11:18:44,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:18:44,442 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 511 [2020-07-20 11:18:44,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:18:44,451 INFO L225 Difference]: With dead ends: 483 [2020-07-20 11:18:44,452 INFO L226 Difference]: Without dead ends: 301 [2020-07-20 11:18:44,459 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:18:44,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-07-20 11:18:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 301. [2020-07-20 11:18:44,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 301 states. [2020-07-20 11:18:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 600 transitions. [2020-07-20 11:18:44,499 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 600 transitions. Word has length 511 [2020-07-20 11:18:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:18:44,499 INFO L479 AbstractCegarLoop]: Abstraction has 301 states and 600 transitions. [2020-07-20 11:18:44,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:18:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 600 transitions. [2020-07-20 11:18:44,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 11:18:44,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:18:44,507 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 33, 33, 27, 27, 21, 21, 21, 21, 21, 21, 21, 16, 16, 16, 16, 16, 16, 16, 15, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:18:44,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:44,708 INFO L427 AbstractCegarLoop]: === Iteration 73 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:18:44,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:18:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash -38339422, now seen corresponding path program 56 times [2020-07-20 11:18:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:18:44,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818471106] [2020-07-20 11:18:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:18:45,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 11:18:45,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:18:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 7578 backedges. 404 proven. 938 refuted. 0 times theorem prover too weak. 6236 trivial. 0 not checked. [2020-07-20 11:18:46,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:18:48,952 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-07-20 11:18:52,950 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:52,951 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:55,093 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:55,094 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:55,869 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:55,870 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:56,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:56,395 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:56,396 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:56,516 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:56,517 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:56,729 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:18:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7578 backedges. 403 proven. 960 refuted. 0 times theorem prover too weak. 6215 trivial. 0 not checked. [2020-07-20 11:18:57,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818471106] [2020-07-20 11:18:57,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:18:57,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 11:18:57,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958654714] [2020-07-20 11:18:57,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:18:57,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:18:57,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:18:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:18:57,082 INFO L87 Difference]: Start difference. First operand 301 states and 600 transitions. Second operand 21 states. [2020-07-20 11:18:58,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:18:58,269 INFO L93 Difference]: Finished difference Result 352 states and 674 transitions. [2020-07-20 11:18:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:18:58,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 511 [2020-07-20 11:18:58,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:18:58,283 INFO L225 Difference]: With dead ends: 352 [2020-07-20 11:18:58,283 INFO L226 Difference]: Without dead ends: 335 [2020-07-20 11:18:58,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1028 GetRequests, 987 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:18:58,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-07-20 11:18:58,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 299. [2020-07-20 11:18:58,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-07-20 11:18:58,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 594 transitions. [2020-07-20 11:18:58,320 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 594 transitions. Word has length 511 [2020-07-20 11:18:58,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:18:58,320 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 594 transitions. [2020-07-20 11:18:58,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:18:58,320 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 594 transitions. [2020-07-20 11:18:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:18:58,328 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:18:58,329 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:18:58,529 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:58,530 INFO L427 AbstractCegarLoop]: === Iteration 74 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:18:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:18:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash 516830041, now seen corresponding path program 57 times [2020-07-20 11:18:58,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:18:58,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036178338] [2020-07-20 11:18:58,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:18:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:18:59,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:18:59,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:19:00,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 785 proven. 125 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 11:19:00,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:19:03,044 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:03,638 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:03,639 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:03,984 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:04,206 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:04,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:04,456 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:04,766 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:05,823 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 783 proven. 137 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-20 11:19:07,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036178338] [2020-07-20 11:19:07,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:19:07,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:19:07,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281318514] [2020-07-20 11:19:07,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:19:07,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:19:07,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:19:07,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:19:07,978 INFO L87 Difference]: Start difference. First operand 299 states and 594 transitions. Second operand 17 states. [2020-07-20 11:19:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:19:08,781 INFO L93 Difference]: Finished difference Result 309 states and 604 transitions. [2020-07-20 11:19:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:19:08,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 11:19:08,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:19:08,791 INFO L225 Difference]: With dead ends: 309 [2020-07-20 11:19:08,792 INFO L226 Difference]: Without dead ends: 296 [2020-07-20 11:19:08,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:19:08,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-07-20 11:19:08,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 293. [2020-07-20 11:19:08,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-07-20 11:19:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 585 transitions. [2020-07-20 11:19:08,826 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 585 transitions. Word has length 475 [2020-07-20 11:19:08,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:19:08,826 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 585 transitions. [2020-07-20 11:19:08,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:19:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 585 transitions. [2020-07-20 11:19:08,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 11:19:08,835 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:19:08,835 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:19:09,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:09,036 INFO L427 AbstractCegarLoop]: === Iteration 75 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:19:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:19:09,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1127131666, now seen corresponding path program 58 times [2020-07-20 11:19:09,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:19:09,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [494480140] [2020-07-20 11:19:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:19:10,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:19:10,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:19:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 383 proven. 728 refuted. 0 times theorem prover too weak. 5647 trivial. 0 not checked. [2020-07-20 11:19:10,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:19:15,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:17,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:17,414 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:17,955 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:18,295 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:18,296 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:18,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:18,491 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:18,702 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:18,944 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:19,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 385 proven. 740 refuted. 0 times theorem prover too weak. 5633 trivial. 0 not checked. [2020-07-20 11:19:19,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [494480140] [2020-07-20 11:19:19,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:19:19,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:19:19,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069755654] [2020-07-20 11:19:19,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:19:19,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:19:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:19:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:19:19,489 INFO L87 Difference]: Start difference. First operand 293 states and 585 transitions. Second operand 19 states. [2020-07-20 11:19:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:19:20,396 INFO L93 Difference]: Finished difference Result 351 states and 659 transitions. [2020-07-20 11:19:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:19:20,400 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-20 11:19:20,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:19:20,406 INFO L225 Difference]: With dead ends: 351 [2020-07-20 11:19:20,406 INFO L226 Difference]: Without dead ends: 323 [2020-07-20 11:19:20,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:19:20,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2020-07-20 11:19:20,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 293. [2020-07-20 11:19:20,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-07-20 11:19:20,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 585 transitions. [2020-07-20 11:19:20,437 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 585 transitions. Word has length 487 [2020-07-20 11:19:20,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:19:20,437 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 585 transitions. [2020-07-20 11:19:20,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:19:20,437 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 585 transitions. [2020-07-20 11:19:20,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 11:19:20,444 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:19:20,444 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:19:20,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:20,645 INFO L427 AbstractCegarLoop]: === Iteration 76 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:19:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:19:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1231310206, now seen corresponding path program 59 times [2020-07-20 11:19:20,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:19:20,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1295850927] [2020-07-20 11:19:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:21,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:19:21,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:19:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:19:21,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 567 proven. 544 refuted. 0 times theorem prover too weak. 5655 trivial. 0 not checked. [2020-07-20 11:19:21,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:19:26,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:26,764 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:27,581 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:28,128 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:28,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:28,741 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:28,742 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:29,041 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:29,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 567 proven. 558 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-20 11:19:30,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1295850927] [2020-07-20 11:19:30,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:19:30,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:19:30,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134001189] [2020-07-20 11:19:30,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:19:30,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:19:30,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:19:30,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:19:30,794 INFO L87 Difference]: Start difference. First operand 293 states and 585 transitions. Second operand 19 states. [2020-07-20 11:19:31,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:19:31,652 INFO L93 Difference]: Finished difference Result 323 states and 622 transitions. [2020-07-20 11:19:31,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:19:31,656 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-20 11:19:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:19:31,663 INFO L225 Difference]: With dead ends: 323 [2020-07-20 11:19:31,663 INFO L226 Difference]: Without dead ends: 311 [2020-07-20 11:19:31,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:19:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-07-20 11:19:31,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 296. [2020-07-20 11:19:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-07-20 11:19:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 592 transitions. [2020-07-20 11:19:31,696 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 592 transitions. Word has length 487 [2020-07-20 11:19:31,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:19:31,696 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 592 transitions. [2020-07-20 11:19:31,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:19:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 592 transitions. [2020-07-20 11:19:31,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 11:19:31,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:19:31,708 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 36, 36, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 12, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:19:31,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:31,922 INFO L427 AbstractCegarLoop]: === Iteration 77 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:19:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:19:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1959486076, now seen corresponding path program 60 times [2020-07-20 11:19:31,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:19:31,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286846043] [2020-07-20 11:19:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:33,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:19:33,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:19:33,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:19:33,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 373 proven. 796 refuted. 0 times theorem prover too weak. 6313 trivial. 0 not checked. [2020-07-20 11:19:33,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:19:38,403 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:38,404 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:40,135 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:40,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:40,762 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:40,763 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:41,207 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:41,208 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:41,428 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:41,429 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:41,645 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:41,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:42,498 INFO L134 CoverageAnalysis]: Checked inductivity of 7482 backedges. 375 proven. 810 refuted. 0 times theorem prover too weak. 6297 trivial. 0 not checked. [2020-07-20 11:19:42,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286846043] [2020-07-20 11:19:42,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:19:42,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:19:42,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791813808] [2020-07-20 11:19:42,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:19:42,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:19:42,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:19:42,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:19:42,501 INFO L87 Difference]: Start difference. First operand 296 states and 592 transitions. Second operand 19 states. [2020-07-20 11:19:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:19:43,380 INFO L93 Difference]: Finished difference Result 392 states and 803 transitions. [2020-07-20 11:19:43,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:19:43,384 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-20 11:19:43,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:19:43,393 INFO L225 Difference]: With dead ends: 392 [2020-07-20 11:19:43,393 INFO L226 Difference]: Without dead ends: 365 [2020-07-20 11:19:43,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 991 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:19:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2020-07-20 11:19:43,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 293. [2020-07-20 11:19:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 293 states. [2020-07-20 11:19:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 587 transitions. [2020-07-20 11:19:43,433 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 587 transitions. Word has length 511 [2020-07-20 11:19:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:19:43,433 INFO L479 AbstractCegarLoop]: Abstraction has 293 states and 587 transitions. [2020-07-20 11:19:43,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:19:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 587 transitions. [2020-07-20 11:19:43,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:19:43,440 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:19:43,440 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:19:43,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:43,641 INFO L427 AbstractCegarLoop]: === Iteration 78 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:19:43,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:19:43,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1570124953, now seen corresponding path program 61 times [2020-07-20 11:19:43,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:19:43,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1090326999] [2020-07-20 11:19:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:19:44,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:19:44,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:19:45,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 772 proven. 138 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 11:19:45,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:19:47,838 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:48,376 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:48,786 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:48,787 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:48,996 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:49,197 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:49,427 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:50,425 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:52,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 770 proven. 150 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-20 11:19:52,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1090326999] [2020-07-20 11:19:52,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:19:52,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:19:52,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349668601] [2020-07-20 11:19:52,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:19:52,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:19:52,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:19:52,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:19:52,663 INFO L87 Difference]: Start difference. First operand 293 states and 587 transitions. Second operand 17 states. [2020-07-20 11:19:53,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:19:53,454 INFO L93 Difference]: Finished difference Result 383 states and 771 transitions. [2020-07-20 11:19:53,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:19:53,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 11:19:53,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:19:53,467 INFO L225 Difference]: With dead ends: 383 [2020-07-20 11:19:53,467 INFO L226 Difference]: Without dead ends: 370 [2020-07-20 11:19:53,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:19:53,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-07-20 11:19:53,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 304. [2020-07-20 11:19:53,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-07-20 11:19:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 610 transitions. [2020-07-20 11:19:53,505 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 610 transitions. Word has length 475 [2020-07-20 11:19:53,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:19:53,506 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 610 transitions. [2020-07-20 11:19:53,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:19:53,506 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 610 transitions. [2020-07-20 11:19:53,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:19:53,513 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:19:53,513 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:19:53,714 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:53,715 INFO L427 AbstractCegarLoop]: === Iteration 79 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:19:53,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:19:53,716 INFO L82 PathProgramCache]: Analyzing trace with hash -582108663, now seen corresponding path program 62 times [2020-07-20 11:19:53,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:19:53,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2030175334] [2020-07-20 11:19:53,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:19:54,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:19:54,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:19:54,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:19:55,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 930 proven. 151 refuted. 0 times theorem prover too weak. 5333 trivial. 0 not checked. [2020-07-20 11:19:55,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:19:58,751 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:58,752 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:19:59,546 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2020-07-20 11:19:59,669 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:00,261 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:00,262 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:00,625 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:00,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:00,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:00,873 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:01,315 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:02,402 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:04,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 928 proven. 167 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-20 11:20:04,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2030175334] [2020-07-20 11:20:04,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:20:04,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:20:04,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41810463] [2020-07-20 11:20:04,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:20:04,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:04,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:20:04,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:20:04,643 INFO L87 Difference]: Start difference. First operand 304 states and 610 transitions. Second operand 19 states. [2020-07-20 11:20:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:05,581 INFO L93 Difference]: Finished difference Result 359 states and 691 transitions. [2020-07-20 11:20:05,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:20:05,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-20 11:20:05,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:05,592 INFO L225 Difference]: With dead ends: 359 [2020-07-20 11:20:05,592 INFO L226 Difference]: Without dead ends: 346 [2020-07-20 11:20:05,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:20:05,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-07-20 11:20:05,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 273. [2020-07-20 11:20:05,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-20 11:20:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 543 transitions. [2020-07-20 11:20:05,626 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 543 transitions. Word has length 475 [2020-07-20 11:20:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:05,627 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 543 transitions. [2020-07-20 11:20:05,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:20:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 543 transitions. [2020-07-20 11:20:05,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 11:20:05,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:05,635 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 28, 27, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 10, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:20:05,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:05,836 INFO L427 AbstractCegarLoop]: === Iteration 80 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:05,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1774304401, now seen corresponding path program 63 times [2020-07-20 11:20:05,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:05,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944277208] [2020-07-20 11:20:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:06,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:06,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:20:06,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:07,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 548 proven. 534 refuted. 0 times theorem prover too weak. 6055 trivial. 0 not checked. [2020-07-20 11:20:07,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:20:12,561 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:12,562 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:13,310 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:13,311 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:13,753 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:13,754 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:14,011 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:14,012 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:14,169 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:14,288 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:14,435 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:14,969 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:16,078 INFO L134 CoverageAnalysis]: Checked inductivity of 7137 backedges. 550 proven. 548 refuted. 0 times theorem prover too weak. 6039 trivial. 0 not checked. [2020-07-20 11:20:16,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1944277208] [2020-07-20 11:20:16,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:20:16,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:20:16,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739053311] [2020-07-20 11:20:16,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:20:16,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:16,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:20:16,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:20:16,080 INFO L87 Difference]: Start difference. First operand 273 states and 543 transitions. Second operand 17 states. [2020-07-20 11:20:16,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:16,965 INFO L93 Difference]: Finished difference Result 327 states and 609 transitions. [2020-07-20 11:20:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:20:16,969 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 500 [2020-07-20 11:20:16,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:16,975 INFO L225 Difference]: With dead ends: 327 [2020-07-20 11:20:16,976 INFO L226 Difference]: Without dead ends: 310 [2020-07-20 11:20:16,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 971 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:20:16,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-07-20 11:20:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 273. [2020-07-20 11:20:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-20 11:20:17,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 543 transitions. [2020-07-20 11:20:17,013 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 543 transitions. Word has length 500 [2020-07-20 11:20:17,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:17,013 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 543 transitions. [2020-07-20 11:20:17,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:20:17,013 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 543 transitions. [2020-07-20 11:20:17,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 11:20:17,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:17,020 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 34, 34, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:20:17,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:17,221 INFO L427 AbstractCegarLoop]: === Iteration 81 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:17,222 INFO L82 PathProgramCache]: Analyzing trace with hash 293510740, now seen corresponding path program 64 times [2020-07-20 11:20:17,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:17,222 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186806699] [2020-07-20 11:20:17,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:18,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:18,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:20:18,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:18,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 524 proven. 585 refuted. 0 times theorem prover too weak. 5657 trivial. 0 not checked. [2020-07-20 11:20:18,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:20:24,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:24,273 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:25,173 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:25,940 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:26,279 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:26,280 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:26,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:26,518 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:26,776 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:27,225 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:28,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6766 backedges. 522 proven. 603 refuted. 0 times theorem prover too weak. 5641 trivial. 0 not checked. [2020-07-20 11:20:28,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186806699] [2020-07-20 11:20:28,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:20:28,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:20:28,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271548891] [2020-07-20 11:20:28,445 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:20:28,445 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:28,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:20:28,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:20:28,446 INFO L87 Difference]: Start difference. First operand 273 states and 543 transitions. Second operand 19 states. [2020-07-20 11:20:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:29,419 INFO L93 Difference]: Finished difference Result 333 states and 662 transitions. [2020-07-20 11:20:29,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:20:29,425 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-20 11:20:29,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:29,432 INFO L225 Difference]: With dead ends: 333 [2020-07-20 11:20:29,432 INFO L226 Difference]: Without dead ends: 321 [2020-07-20 11:20:29,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:20:29,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-07-20 11:20:29,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 273. [2020-07-20 11:20:29,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-20 11:20:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 543 transitions. [2020-07-20 11:20:29,465 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 543 transitions. Word has length 487 [2020-07-20 11:20:29,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:29,465 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 543 transitions. [2020-07-20 11:20:29,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:20:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 543 transitions. [2020-07-20 11:20:29,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2020-07-20 11:20:29,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:29,471 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 28, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 11, 10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:20:29,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:29,672 INFO L427 AbstractCegarLoop]: === Iteration 82 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:29,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:29,673 INFO L82 PathProgramCache]: Analyzing trace with hash 452052929, now seen corresponding path program 65 times [2020-07-20 11:20:29,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:29,674 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340256598] [2020-07-20 11:20:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:30,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1058 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:20:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:31,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 536 proven. 656 refuted. 0 times theorem prover too weak. 5249 trivial. 0 not checked. [2020-07-20 11:20:31,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:20:37,485 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:38,587 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:38,588 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:39,492 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:40,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:40,326 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:40,474 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:40,579 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:40,987 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 538 proven. 677 refuted. 0 times theorem prover too weak. 5226 trivial. 0 not checked. [2020-07-20 11:20:42,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340256598] [2020-07-20 11:20:42,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:20:42,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:20:42,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079801661] [2020-07-20 11:20:42,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:20:42,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:42,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:20:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:20:42,261 INFO L87 Difference]: Start difference. First operand 273 states and 543 transitions. Second operand 19 states. [2020-07-20 11:20:43,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:43,281 INFO L93 Difference]: Finished difference Result 361 states and 701 transitions. [2020-07-20 11:20:43,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:20:43,287 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 476 [2020-07-20 11:20:43,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:43,294 INFO L225 Difference]: With dead ends: 361 [2020-07-20 11:20:43,295 INFO L226 Difference]: Without dead ends: 349 [2020-07-20 11:20:43,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 919 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:20:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2020-07-20 11:20:43,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 273. [2020-07-20 11:20:43,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-07-20 11:20:43,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 543 transitions. [2020-07-20 11:20:43,329 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 543 transitions. Word has length 476 [2020-07-20 11:20:43,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:43,329 INFO L479 AbstractCegarLoop]: Abstraction has 273 states and 543 transitions. [2020-07-20 11:20:43,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:20:43,330 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 543 transitions. [2020-07-20 11:20:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2020-07-20 11:20:43,335 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:43,335 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 33, 33, 28, 27, 20, 20, 20, 20, 20, 20, 20, 16, 16, 16, 16, 16, 16, 16, 12, 12, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:20:43,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:43,536 INFO L427 AbstractCegarLoop]: === Iteration 83 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash -788810207, now seen corresponding path program 66 times [2020-07-20 11:20:43,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:43,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680896998] [2020-07-20 11:20:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:44,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:44,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 1112 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:20:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 860 proven. 230 refuted. 0 times theorem prover too weak. 6111 trivial. 0 not checked. [2020-07-20 11:20:45,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:20:47,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:47,999 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:48,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:48,650 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:49,075 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:49,076 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:49,398 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:49,399 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:49,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:49,755 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:49,949 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:50,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:54,612 INFO L134 CoverageAnalysis]: Checked inductivity of 7201 backedges. 862 proven. 244 refuted. 0 times theorem prover too weak. 6095 trivial. 0 not checked. [2020-07-20 11:20:54,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680896998] [2020-07-20 11:20:54,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:20:54,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 15] total 17 [2020-07-20 11:20:54,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837837880] [2020-07-20 11:20:54,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:20:54,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:54,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:20:54,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:20:54,615 INFO L87 Difference]: Start difference. First operand 273 states and 543 transitions. Second operand 17 states. [2020-07-20 11:20:55,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:55,502 INFO L93 Difference]: Finished difference Result 317 states and 593 transitions. [2020-07-20 11:20:55,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:20:55,502 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 500 [2020-07-20 11:20:55,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:55,507 INFO L225 Difference]: With dead ends: 317 [2020-07-20 11:20:55,507 INFO L226 Difference]: Without dead ends: 294 [2020-07-20 11:20:55,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1005 GetRequests, 971 SyntacticMatches, 13 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:20:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-07-20 11:20:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 270. [2020-07-20 11:20:55,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-07-20 11:20:55,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 536 transitions. [2020-07-20 11:20:55,540 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 536 transitions. Word has length 500 [2020-07-20 11:20:55,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:55,541 INFO L479 AbstractCegarLoop]: Abstraction has 270 states and 536 transitions. [2020-07-20 11:20:55,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:20:55,541 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 536 transitions. [2020-07-20 11:20:55,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 11:20:55,548 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:55,548 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 33, 33, 27, 27, 19, 19, 19, 19, 19, 19, 19, 16, 16, 16, 16, 16, 16, 16, 11, 11, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:20:55,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:55,749 INFO L427 AbstractCegarLoop]: === Iteration 84 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:55,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:55,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1573202366, now seen corresponding path program 67 times [2020-07-20 11:20:55,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:55,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092633198] [2020-07-20 11:20:55,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:56,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:56,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 11:20:56,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:57,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 586 proven. 688 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 11:20:57,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:21:03,552 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-07-20 11:21:03,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:03,609 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:04,928 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:04,929 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:06,019 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:06,672 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:06,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:07,039 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:07,040 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:07,277 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:07,278 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:07,882 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:09,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6790 backedges. 583 proven. 712 refuted. 0 times theorem prover too weak. 5495 trivial. 0 not checked. [2020-07-20 11:21:09,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092633198] [2020-07-20 11:21:09,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:21:09,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 11:21:09,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521060467] [2020-07-20 11:21:09,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:21:09,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:21:09,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:21:09,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:21:09,180 INFO L87 Difference]: Start difference. First operand 270 states and 536 transitions. Second operand 21 states. [2020-07-20 11:21:10,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:21:10,528 INFO L93 Difference]: Finished difference Result 372 states and 710 transitions. [2020-07-20 11:21:10,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:21:10,533 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 487 [2020-07-20 11:21:10,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:21:10,540 INFO L225 Difference]: With dead ends: 372 [2020-07-20 11:21:10,541 INFO L226 Difference]: Without dead ends: 360 [2020-07-20 11:21:10,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 980 GetRequests, 939 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:21:10,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2020-07-20 11:21:10,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2020-07-20 11:21:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2020-07-20 11:21:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 516 transitions. [2020-07-20 11:21:10,577 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 516 transitions. Word has length 487 [2020-07-20 11:21:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:21:10,577 INFO L479 AbstractCegarLoop]: Abstraction has 263 states and 516 transitions. [2020-07-20 11:21:10,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:21:10,578 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 516 transitions. [2020-07-20 11:21:10,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 512 [2020-07-20 11:21:10,584 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:21:10,584 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 27, 27, 19, 19, 19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 11, 10, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:21:10,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:10,785 INFO L427 AbstractCegarLoop]: === Iteration 85 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:21:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:21:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1861099042, now seen corresponding path program 68 times [2020-07-20 11:21:10,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:21:10,787 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138825903] [2020-07-20 11:21:10,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:21:12,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 1137 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:21:12,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:21:12,505 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 516 proven. 655 refuted. 0 times theorem prover too weak. 6303 trivial. 0 not checked. [2020-07-20 11:21:12,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:21:18,824 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:18,825 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:19,818 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:19,819 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:20,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:20,707 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:21,189 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:21,407 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:21,408 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:21,626 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:22,010 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 518 proven. 667 refuted. 0 times theorem prover too weak. 6289 trivial. 0 not checked. [2020-07-20 11:21:23,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138825903] [2020-07-20 11:21:23,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:21:23,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:21:23,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962149209] [2020-07-20 11:21:23,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:21:23,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:21:23,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:21:23,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:21:23,214 INFO L87 Difference]: Start difference. First operand 263 states and 516 transitions. Second operand 19 states. [2020-07-20 11:21:24,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:21:24,165 INFO L93 Difference]: Finished difference Result 361 states and 702 transitions. [2020-07-20 11:21:24,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:21:24,167 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 511 [2020-07-20 11:21:24,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:21:24,174 INFO L225 Difference]: With dead ends: 361 [2020-07-20 11:21:24,175 INFO L226 Difference]: Without dead ends: 344 [2020-07-20 11:21:24,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 1027 GetRequests, 991 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:21:24,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2020-07-20 11:21:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 245. [2020-07-20 11:21:24,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-07-20 11:21:24,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 473 transitions. [2020-07-20 11:21:24,207 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 473 transitions. Word has length 511 [2020-07-20 11:21:24,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:21:24,207 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 473 transitions. [2020-07-20 11:21:24,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:21:24,207 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 473 transitions. [2020-07-20 11:21:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-07-20 11:21:24,212 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:21:24,213 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 27, 27, 18, 18, 18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 10, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:21:24,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:24,421 INFO L427 AbstractCegarLoop]: === Iteration 86 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:21:24,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:21:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash 966523314, now seen corresponding path program 69 times [2020-07-20 11:21:24,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:21:24,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323108572] [2020-07-20 11:21:24,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:21:25,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:21:25,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:21:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 806 proven. 305 refuted. 0 times theorem prover too weak. 5647 trivial. 0 not checked. [2020-07-20 11:21:25,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:21:27,971 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2020-07-20 11:21:30,245 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:30,246 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:31,640 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:31,641 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:32,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:32,536 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:32,916 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:32,917 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:33,216 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:33,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:34,194 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:36,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6758 backedges. 806 proven. 319 refuted. 0 times theorem prover too weak. 5633 trivial. 0 not checked. [2020-07-20 11:21:36,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323108572] [2020-07-20 11:21:36,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:21:36,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:21:36,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273442802] [2020-07-20 11:21:36,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:21:36,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:21:36,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:21:36,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:21:36,565 INFO L87 Difference]: Start difference. First operand 245 states and 473 transitions. Second operand 19 states. [2020-07-20 11:21:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:21:37,664 INFO L93 Difference]: Finished difference Result 316 states and 591 transitions. [2020-07-20 11:21:37,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:21:37,669 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 487 [2020-07-20 11:21:37,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:21:37,675 INFO L225 Difference]: With dead ends: 316 [2020-07-20 11:21:37,675 INFO L226 Difference]: Without dead ends: 301 [2020-07-20 11:21:37,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 979 GetRequests, 943 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:21:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2020-07-20 11:21:37,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 245. [2020-07-20 11:21:37,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 245 states. [2020-07-20 11:21:37,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 473 transitions. [2020-07-20 11:21:37,705 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 473 transitions. Word has length 487 [2020-07-20 11:21:37,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:21:37,705 INFO L479 AbstractCegarLoop]: Abstraction has 245 states and 473 transitions. [2020-07-20 11:21:37,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:21:37,705 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 473 transitions. [2020-07-20 11:21:37,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:21:37,712 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:21:37,712 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:21:37,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:37,913 INFO L427 AbstractCegarLoop]: === Iteration 87 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:21:37,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:21:37,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2037969703, now seen corresponding path program 70 times [2020-07-20 11:21:37,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:21:37,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131496943] [2020-07-20 11:21:37,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:21:39,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:21:39,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:21:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 470 proven. 440 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 11:21:39,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:21:44,304 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:44,305 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:45,103 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:45,104 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:45,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:45,554 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:45,803 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:45,804 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:46,060 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:46,254 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:46,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 470 proven. 450 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-20 11:21:48,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131496943] [2020-07-20 11:21:48,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:21:48,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:21:48,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57619194] [2020-07-20 11:21:48,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:21:48,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:21:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:21:48,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:21:48,201 INFO L87 Difference]: Start difference. First operand 245 states and 473 transitions. Second operand 17 states. [2020-07-20 11:21:48,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:21:49,000 INFO L93 Difference]: Finished difference Result 283 states and 516 transitions. [2020-07-20 11:21:49,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:21:49,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 11:21:49,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:21:49,010 INFO L225 Difference]: With dead ends: 283 [2020-07-20 11:21:49,010 INFO L226 Difference]: Without dead ends: 271 [2020-07-20 11:21:49,013 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:21:49,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-07-20 11:21:49,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 239. [2020-07-20 11:21:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-20 11:21:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 462 transitions. [2020-07-20 11:21:49,041 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 462 transitions. Word has length 475 [2020-07-20 11:21:49,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:21:49,041 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 462 transitions. [2020-07-20 11:21:49,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:21:49,041 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 462 transitions. [2020-07-20 11:21:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:21:49,046 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:21:49,047 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:21:49,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:49,261 INFO L427 AbstractCegarLoop]: === Iteration 88 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:21:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:21:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1577557621, now seen corresponding path program 71 times [2020-07-20 11:21:49,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:21:49,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424234357] [2020-07-20 11:21:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:21:50,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:21:50,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-20 11:21:50,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:21:50,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 698 proven. 212 refuted. 0 times theorem prover too weak. 5516 trivial. 0 not checked. [2020-07-20 11:21:50,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:21:53,953 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:53,954 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:55,058 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:55,468 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:55,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:55,703 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:55,942 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:56,116 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:56,991 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:21:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 698 proven. 222 refuted. 0 times theorem prover too weak. 5506 trivial. 0 not checked. [2020-07-20 11:21:59,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424234357] [2020-07-20 11:21:59,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:21:59,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 17 [2020-07-20 11:21:59,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022785493] [2020-07-20 11:21:59,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 11:21:59,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:21:59,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 11:21:59,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-07-20 11:21:59,494 INFO L87 Difference]: Start difference. First operand 239 states and 462 transitions. Second operand 17 states. [2020-07-20 11:22:00,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:00,300 INFO L93 Difference]: Finished difference Result 275 states and 502 transitions. [2020-07-20 11:22:00,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:22:00,305 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 475 [2020-07-20 11:22:00,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:00,310 INFO L225 Difference]: With dead ends: 275 [2020-07-20 11:22:00,310 INFO L226 Difference]: Without dead ends: 260 [2020-07-20 11:22:00,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 954 GetRequests, 923 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2020-07-20 11:22:00,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-20 11:22:00,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 239. [2020-07-20 11:22:00,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-07-20 11:22:00,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 462 transitions. [2020-07-20 11:22:00,337 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 462 transitions. Word has length 475 [2020-07-20 11:22:00,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:00,337 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 462 transitions. [2020-07-20 11:22:00,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 11:22:00,337 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 462 transitions. [2020-07-20 11:22:00,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:22:00,343 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:00,343 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:00,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:00,544 INFO L427 AbstractCegarLoop]: === Iteration 89 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:00,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:00,545 INFO L82 PathProgramCache]: Analyzing trace with hash -855524837, now seen corresponding path program 72 times [2020-07-20 11:22:00,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:00,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541483201] [2020-07-20 11:22:00,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:01,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:01,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:22:01,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 847 proven. 232 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-20 11:22:02,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:22:04,640 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-07-20 11:22:05,312 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 17 [2020-07-20 11:22:06,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:06,325 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:07,633 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:08,212 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:08,607 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:08,608 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:08,844 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:09,188 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:10,068 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 845 proven. 250 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-20 11:22:12,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541483201] [2020-07-20 11:22:12,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:22:12,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:22:12,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718622258] [2020-07-20 11:22:12,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:22:12,581 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:12,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:22:12,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:22:12,581 INFO L87 Difference]: Start difference. First operand 239 states and 462 transitions. Second operand 19 states. [2020-07-20 11:22:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:13,755 INFO L93 Difference]: Finished difference Result 268 states and 501 transitions. [2020-07-20 11:22:13,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:22:13,756 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-20 11:22:13,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:13,760 INFO L225 Difference]: With dead ends: 268 [2020-07-20 11:22:13,760 INFO L226 Difference]: Without dead ends: 253 [2020-07-20 11:22:13,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:22:13,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-07-20 11:22:13,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 231. [2020-07-20 11:22:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-07-20 11:22:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 428 transitions. [2020-07-20 11:22:13,803 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 428 transitions. Word has length 475 [2020-07-20 11:22:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:13,804 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 428 transitions. [2020-07-20 11:22:13,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:22:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 428 transitions. [2020-07-20 11:22:13,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 11:22:13,813 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:13,813 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 11, 11, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:14,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:14,028 INFO L427 AbstractCegarLoop]: === Iteration 90 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:14,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:14,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1698746006, now seen corresponding path program 73 times [2020-07-20 11:22:14,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:14,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550145733] [2020-07-20 11:22:14,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:15,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 11:22:15,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 837 proven. 321 refuted. 0 times theorem prover too weak. 4951 trivial. 0 not checked. [2020-07-20 11:22:15,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:22:20,271 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:20,272 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:21,807 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:21,808 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:22,747 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:22,748 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:23,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:23,321 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:23,649 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:23,651 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:23,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:23,829 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:23,945 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:24,673 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:27,304 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 841 proven. 338 refuted. 0 times theorem prover too weak. 4930 trivial. 0 not checked. [2020-07-20 11:22:27,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550145733] [2020-07-20 11:22:27,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:22:27,305 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 19 [2020-07-20 11:22:27,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237818140] [2020-07-20 11:22:27,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:22:27,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:27,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:22:27,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:22:27,306 INFO L87 Difference]: Start difference. First operand 231 states and 428 transitions. Second operand 19 states. [2020-07-20 11:22:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:28,382 INFO L93 Difference]: Finished difference Result 329 states and 608 transitions. [2020-07-20 11:22:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:22:28,388 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 464 [2020-07-20 11:22:28,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:28,396 INFO L225 Difference]: With dead ends: 329 [2020-07-20 11:22:28,396 INFO L226 Difference]: Without dead ends: 314 [2020-07-20 11:22:28,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 934 GetRequests, 895 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-07-20 11:22:28,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-07-20 11:22:28,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 203. [2020-07-20 11:22:28,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-07-20 11:22:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 360 transitions. [2020-07-20 11:22:28,425 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 360 transitions. Word has length 464 [2020-07-20 11:22:28,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:28,426 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 360 transitions. [2020-07-20 11:22:28,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:22:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 360 transitions. [2020-07-20 11:22:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:22:28,430 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:28,431 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:28,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:28,632 INFO L427 AbstractCegarLoop]: === Iteration 91 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:28,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:28,632 INFO L82 PathProgramCache]: Analyzing trace with hash -151584039, now seen corresponding path program 74 times [2020-07-20 11:22:28,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:28,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [459050381] [2020-07-20 11:22:28,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:29,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:29,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 11:22:29,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:30,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 899 proven. 341 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-20 11:22:30,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:22:32,898 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 11:22:33,001 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:22:35,617 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-07-20 11:22:35,678 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:37,594 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:37,595 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:38,727 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:39,449 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:39,450 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:39,887 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:39,888 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:40,138 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:40,139 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:41,018 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 896 proven. 365 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-20 11:22:43,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [459050381] [2020-07-20 11:22:43,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:22:43,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 11:22:43,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000459013] [2020-07-20 11:22:43,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:22:43,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:43,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:22:43,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:22:43,607 INFO L87 Difference]: Start difference. First operand 203 states and 360 transitions. Second operand 21 states. [2020-07-20 11:22:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:45,027 INFO L93 Difference]: Finished difference Result 340 states and 606 transitions. [2020-07-20 11:22:45,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:22:45,028 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-20 11:22:45,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:45,035 INFO L225 Difference]: With dead ends: 340 [2020-07-20 11:22:45,035 INFO L226 Difference]: Without dead ends: 317 [2020-07-20 11:22:45,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:22:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-07-20 11:22:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 193. [2020-07-20 11:22:45,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-07-20 11:22:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 339 transitions. [2020-07-20 11:22:45,063 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 339 transitions. Word has length 475 [2020-07-20 11:22:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:45,063 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 339 transitions. [2020-07-20 11:22:45,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:22:45,063 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 339 transitions. [2020-07-20 11:22:45,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:22:45,067 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:45,068 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:45,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:45,269 INFO L427 AbstractCegarLoop]: === Iteration 92 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:45,270 INFO L82 PathProgramCache]: Analyzing trace with hash -583811255, now seen corresponding path program 75 times [2020-07-20 11:22:45,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:45,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663963370] [2020-07-20 11:22:45,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:22:46,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-20 11:22:46,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:22:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 787 proven. 292 refuted. 0 times theorem prover too weak. 5335 trivial. 0 not checked. [2020-07-20 11:22:47,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:22:51,442 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:51,443 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:52,907 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:52,908 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:53,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:53,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:54,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:54,333 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:54,592 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:54,847 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:55,571 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:22:58,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 787 proven. 308 refuted. 0 times theorem prover too weak. 5319 trivial. 0 not checked. [2020-07-20 11:22:58,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663963370] [2020-07-20 11:22:58,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:22:58,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 19 [2020-07-20 11:22:58,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273048399] [2020-07-20 11:22:58,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 11:22:58,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:22:58,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 11:22:58,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2020-07-20 11:22:58,322 INFO L87 Difference]: Start difference. First operand 193 states and 339 transitions. Second operand 19 states. [2020-07-20 11:22:59,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:22:59,434 INFO L93 Difference]: Finished difference Result 241 states and 423 transitions. [2020-07-20 11:22:59,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 11:22:59,438 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 475 [2020-07-20 11:22:59,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:22:59,443 INFO L225 Difference]: With dead ends: 241 [2020-07-20 11:22:59,444 INFO L226 Difference]: Without dead ends: 208 [2020-07-20 11:22:59,446 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 919 SyntacticMatches, 13 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2020-07-20 11:22:59,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-07-20 11:22:59,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 137. [2020-07-20 11:22:59,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-07-20 11:22:59,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 240 transitions. [2020-07-20 11:22:59,461 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 240 transitions. Word has length 475 [2020-07-20 11:22:59,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:22:59,462 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 240 transitions. [2020-07-20 11:22:59,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 11:22:59,462 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 240 transitions. [2020-07-20 11:22:59,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2020-07-20 11:22:59,465 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:22:59,465 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 28, 27, 17, 17, 17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 12, 10, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:22:59,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:22:59,670 INFO L427 AbstractCegarLoop]: === Iteration 93 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:22:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:22:59,671 INFO L82 PathProgramCache]: Analyzing trace with hash -477489234, now seen corresponding path program 76 times [2020-07-20 11:22:59,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:22:59,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564316511] [2020-07-20 11:22:59,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:00,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:23:00,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 1031 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 11:23:00,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:23:01,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 228 proven. 1086 refuted. 0 times theorem prover too weak. 4795 trivial. 0 not checked. [2020-07-20 11:23:01,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:23:03,550 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:23:03,658 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:23:04,216 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 11:23:04,331 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-07-20 11:23:04,449 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:23:04,570 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-07-20 11:23:04,677 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:23:09,248 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2020-07-20 11:23:09,822 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:12,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:12,734 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:14,509 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:14,510 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:15,519 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:15,520 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:16,136 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:16,137 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:16,487 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:16,488 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:16,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:16,676 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:16,800 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6109 backedges. 234 proven. 1110 refuted. 0 times theorem prover too weak. 4765 trivial. 0 not checked. [2020-07-20 11:23:17,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564316511] [2020-07-20 11:23:17,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:23:17,051 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 19] total 21 [2020-07-20 11:23:17,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778628224] [2020-07-20 11:23:17,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:23:17,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:23:17,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:23:17,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:23:17,052 INFO L87 Difference]: Start difference. First operand 137 states and 240 transitions. Second operand 21 states. [2020-07-20 11:23:18,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:23:18,662 INFO L93 Difference]: Finished difference Result 236 states and 444 transitions. [2020-07-20 11:23:18,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:23:18,668 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 464 [2020-07-20 11:23:18,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:23:18,673 INFO L225 Difference]: With dead ends: 236 [2020-07-20 11:23:18,673 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 11:23:18,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 935 GetRequests, 891 SyntacticMatches, 17 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=167, Invalid=645, Unknown=0, NotChecked=0, Total=812 [2020-07-20 11:23:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 11:23:18,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2020-07-20 11:23:18,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-07-20 11:23:18,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 189 transitions. [2020-07-20 11:23:18,688 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 189 transitions. Word has length 464 [2020-07-20 11:23:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:23:18,688 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 189 transitions. [2020-07-20 11:23:18,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:23:18,689 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 189 transitions. [2020-07-20 11:23:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:23:18,693 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:23:18,693 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 33, 33, 27, 27, 18, 18, 18, 18, 18, 18, 18, 16, 16, 16, 16, 16, 16, 16, 11, 9, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:23:18,894 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:18,895 INFO L427 AbstractCegarLoop]: === Iteration 94 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:23:18,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:23:18,895 INFO L82 PathProgramCache]: Analyzing trace with hash 759223819, now seen corresponding path program 77 times [2020-07-20 11:23:18,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:23:18,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986382544] [2020-07-20 11:23:18,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:23:20,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 17 conjunts are in the unsatisfiable core [2020-07-20 11:23:20,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:23:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 258 proven. 982 refuted. 0 times theorem prover too weak. 5186 trivial. 0 not checked. [2020-07-20 11:23:20,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:23:22,044 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 11:23:22,149 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-07-20 11:23:22,261 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:23:22,369 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:23:22,474 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2020-07-20 11:23:22,725 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-07-20 11:23:27,024 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:27,025 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:29,420 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2020-07-20 11:23:29,482 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:29,483 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:30,920 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:31,793 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:31,794 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:32,320 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:32,563 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:32,564 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:32,828 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6426 backedges. 259 proven. 1002 refuted. 0 times theorem prover too weak. 5165 trivial. 0 not checked. [2020-07-20 11:23:32,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986382544] [2020-07-20 11:23:32,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:23:32,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 21 [2020-07-20 11:23:32,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033564833] [2020-07-20 11:23:32,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 11:23:32,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:23:33,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 11:23:33,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-07-20 11:23:33,000 INFO L87 Difference]: Start difference. First operand 134 states and 189 transitions. Second operand 21 states. [2020-07-20 11:23:34,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:23:34,349 INFO L93 Difference]: Finished difference Result 220 states and 301 transitions. [2020-07-20 11:23:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:23:34,353 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 475 [2020-07-20 11:23:34,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:23:34,357 INFO L225 Difference]: With dead ends: 220 [2020-07-20 11:23:34,357 INFO L226 Difference]: Without dead ends: 134 [2020-07-20 11:23:34,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 915 SyntacticMatches, 15 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2020-07-20 11:23:34,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-07-20 11:23:34,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 121. [2020-07-20 11:23:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-07-20 11:23:34,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 149 transitions. [2020-07-20 11:23:34,369 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 149 transitions. Word has length 475 [2020-07-20 11:23:34,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:23:34,369 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 149 transitions. [2020-07-20 11:23:34,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 11:23:34,370 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 149 transitions. [2020-07-20 11:23:34,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-07-20 11:23:34,371 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:23:34,372 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 27, 27, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 10, 10, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:23:34,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:34,573 INFO L427 AbstractCegarLoop]: === Iteration 95 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:23:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:23:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash -247769445, now seen corresponding path program 78 times [2020-07-20 11:23:34,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:23:34,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484828178] [2020-07-20 11:23:34,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:23:35,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 19 conjunts are in the unsatisfiable core [2020-07-20 11:23:35,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:23:36,488 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 258 proven. 1140 refuted. 0 times theorem prover too weak. 5016 trivial. 0 not checked. [2020-07-20 11:23:36,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:23:39,253 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:23:39,364 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 44 [2020-07-20 11:23:39,481 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:23:39,586 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2020-07-20 11:23:39,705 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2020-07-20 11:23:39,810 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-07-20 11:23:44,146 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:23:44,248 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2020-07-20 11:23:44,831 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:47,840 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:47,841 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:49,856 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:51,037 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:51,038 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:51,795 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:51,796 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:52,248 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:52,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:52,535 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:23:52,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6414 backedges. 255 proven. 1173 refuted. 0 times theorem prover too weak. 4986 trivial. 0 not checked. [2020-07-20 11:23:52,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484828178] [2020-07-20 11:23:52,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 11:23:52,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 23 [2020-07-20 11:23:52,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411794161] [2020-07-20 11:23:52,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 11:23:52,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:23:52,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 11:23:52,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2020-07-20 11:23:52,917 INFO L87 Difference]: Start difference. First operand 121 states and 149 transitions. Second operand 23 states. [2020-07-20 11:23:54,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:23:54,453 INFO L93 Difference]: Finished difference Result 203 states and 251 transitions. [2020-07-20 11:23:54,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 11:23:54,459 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 475 [2020-07-20 11:23:54,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:23:54,462 INFO L225 Difference]: With dead ends: 203 [2020-07-20 11:23:54,463 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:23:54,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 957 GetRequests, 911 SyntacticMatches, 17 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=190, Invalid=740, Unknown=0, NotChecked=0, Total=930 [2020-07-20 11:23:54,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:23:54,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:23:54,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:23:54,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:23:54,469 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 475 [2020-07-20 11:23:54,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:23:54,470 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:23:54,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 11:23:54,470 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:23:54,470 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:23:54,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:23:54,675 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:24:10,485 WARN L193 SmtUtils]: Spent 14.56 s on a formula simplification. DAG size of input: 795 DAG size of output: 281 [2020-07-20 11:24:17,862 WARN L193 SmtUtils]: Spent 7.37 s on a formula simplification. DAG size of input: 694 DAG size of output: 246 [2020-07-20 11:24:18,789 WARN L193 SmtUtils]: Spent 923.00 ms on a formula simplification. DAG size of input: 333 DAG size of output: 105 [2020-07-20 11:24:21,675 WARN L193 SmtUtils]: Spent 2.88 s on a formula simplification. DAG size of input: 477 DAG size of output: 197 [2020-07-20 11:24:30,869 WARN L193 SmtUtils]: Spent 9.19 s on a formula simplification. DAG size of input: 741 DAG size of output: 262 [2020-07-20 11:24:31,672 WARN L193 SmtUtils]: Spent 799.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 99 [2020-07-20 11:24:32,471 WARN L193 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 99 [2020-07-20 11:24:33,503 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 342 DAG size of output: 99 [2020-07-20 11:24:38,833 WARN L193 SmtUtils]: Spent 5.33 s on a formula simplification. DAG size of input: 606 DAG size of output: 221